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Master Series Trillium Steel Locking Anal Plug with Expanding Design - Butt Plugs
Master Series Trillium Steel Locking Anal Plug with Expanding Design - Butt Plugs
Master Series Trillium Steel Locking Anal Plug with Expanding Design - Butt Plugs

Master Series Trillium Steel Locking Anal Plug with Expanding Design

$149.99
$149.99

Master Series Trillium Steel Locking Anal Plug commands total submission through its expanding steel construction and tamper-proof locking mechanism, securing intense fullness during extended BDSM scenes as the substantial weight constantly reminds wearers of their controlled state throughout bondage sessions.

Key Features:

Expanding design stretches from 4 cm to 5.8 cm diameter for customizable anal stimulation and intense sensations during penetration and extended wear.

Secure locking mechanism prevents removal and enables hands free anal play with complete confidence during movement and sexual activities with partners or solo.

Medical grade stainless steel construction provides substantial weight for enhanced anal sensations while allowing temperature play for heightened arousal and orgasm intensity.

10.9 cm insertable length delivers deep anal penetration and prostate stimulation for men while providing intense fullness sensations for all users during masturbation.

Waterproof design enables anal play in showers and baths while ensuring thorough cleaning between uses for safe extended sessions and exploration.

Vendor: BDStyle
SKU: BDS-532-NOATTRIBUTES-SHOP-NONE-55310
Availability: Out Of Stock
Product type: Butt Plugs
Please hurry! Only 0 left in stock

Master Series Trillium Steel Locking Anal Plug expands from 4cm to 5.8cm once inserted, gripping internal walls with surgical steel precision as the tamper-proof lock ensures complete surrender of control until your dominant chooses release, turning every movement into a reminder of captivity.

What It Does

This isn't just insertion - it's imprisonment. The tapered tip slides past your rim smoothly, but once the expanding mechanism activates, thick steel petals bloom inside you, stretching your ass wider than the entry point allows for escape. The lock clicks with finality, trapping you in delicious fullness that intensifies with every step, every shift in position.

Cold steel conducts temperature beautifully - chill it in ice water for shocking insertion, or warm it under hot water for gentler stretching. The substantial 350g weight pulls constantly downward, your body fighting gravity while locked steel maintains its territorial claim inside you. Walking becomes a challenge, sitting impossible without gasping reminders of your predicament.

Technical Specs

  • 10.9cm insertable length with 4cm initial diameter
  • Expands to 5.8cm maximum width when activated
  • Medical-grade stainless steel construction weighing 350g
  • Keyed locking mechanism with security tumbler pins
  • Non-porous surface requiring only soap and water cleaning

How To Use It

Start with extensive warm-up using fingers or graduated plugs - this demands serious preparation. Apply generous silicone lube to both your ass and the steel surface. Insert slowly, letting your rim adjust to the initial 4cm girth. Once fully seated, turn the expansion dial clockwise while breathing deeply. Steel petals gradually spread inside you, pushing against nerve-rich walls until reaching your limit.

Insert the key and turn until the lock clicks - you're now captive until someone chooses your release. Test the security by attempting removal; the expanded diameter makes escape impossible without the key. Start with 15-30 minute sessions, building tolerance for longer captivity as your ass adapts to sustained stretching and weight.

Who It Suits

Advanced anal players craving psychological and physical domination will worship this device. Perfect for experienced submissives ready to surrender control completely, or dominants seeking foolproof chastity enforcement. The substantial girth requires significant anal experience - beginners will find this overwhelming and potentially harmful.

Ideal for power exchange relationships where surrender feels incomplete without physical proof. Not suitable for solo play unless you maintain backup key access, and definitely avoid during any medical conditions affecting circulation or bowel function.

Who Makes It?

  • BDStyle specializes in extreme BDSM equipment pushing psychological boundaries
  • Visit the BDStyle brand page →

Feature Breakdown

Feature Specification Sexual Benefit User Experience
Expansion Mechanism 4cm to 5.8cm diameter Inescapable retention Overwhelming fullness
Locking System Keyed tumbler pins Complete surrender Psychological captivity
Steel Construction 350g medical grade Temperature conductivity Gravitational pulling
Length Design 10.9cm insertable Deep internal pressure Constant awareness

Where It Fits in Our Range

Multi Textured Strokers

While strokers typically focus on external stimulation patterns, this plug prioritizes internal texture through steel expansion rather than surface ridges. The smooth steel becomes textured through mechanical spreading, transforming from sleek insertion to complex internal landscape that massages every nerve ending simultaneously.

Browse all Multi Textured Strokers →

Bouncy Sex Balls

Unlike bouncing toys that move freely, this device locks motion completely while its weight shifts internally with body movement. The psychological bounce happens mentally as wearers process their helpless state, while physical weight pulls consistently downward rather than bouncing unpredictably through play sessions.

Explore all Bouncy Sex Balls →

Expert Review from Our In-House Tester

Testing the Master Series Trillium required serious mental preparation alongside physical readiness. After 20 minutes of warm-up with smaller plugs, insertion felt manageable at the initial 4cm width. Activating the expansion mechanism was breathtaking - literally gasping as steel petals bloomed inside me, stretching my ass beyond comfort into thrilling surrender territory. The lock clicking sealed my fate psychologically; knowing escape was impossible without my partner's consent triggered intense submission headspace. Walking around our apartment for 45 minutes tested both physical endurance and mental submission. The 350g weight pulled constantly, making sitting impossible and standing a meditation on controlled breathing. Temperature play beforehand intensified every sensation - chilled steel initially shocked my rim before body heat warmed the metal throughout wear. Removal required assistance as my hands shook too much from intensity overload to operate the key smoothly.

Reasons to Buy

  • Expanding mechanism — guarantees inescapable retention once activated
  • Locking system — enforces complete psychological surrender through physical captivity
  • Steel construction — permits temperature play while maintaining structural integrity
  • Substantial weight — constantly reminds wearers of their dominated status
  • Medical materials — allows extended wear sessions without safety concerns

Why Buy From Cock Ring Shop

  • Genuine BDStyle products with full warranty
  • 100% discreet packaging — no logos, total privacy
  • Fast tracked shipping across Australia
  • Expert BDSM guidance for safe extreme play exploration

Order your Master Series Trillium Steel Locking Anal Plug from the cockringshop and discover true physical surrender through inescapable steel expansion. When ordinary plugs feel insufficient, lock yourself into genuine submission that enhances walking, sitting and breathing into exercises in controlled captivity.

Shipping Information & Policy


Cockringshop.com.au ships with Australia Post. We ship from Sydney.

All in-stock orders placed before 12pm AEST (Sydney Time) on business days are generally processed on the same day. Packages are usually received 1-6 business days after shipping, but may subject to any postage carrier related delays beyond our control.

Free standard shipping on orders shipped within Australia above $200. For orders below $200 standard shipping within Australia is $12.95 and will be added at checkout.

Orders addressed to P.O box, G.P.O box or Parcel Collect will be handled by Australia Post. Extra time should be allocated for these orders.

Shipping Transit Times (Including Free Shipping)

Shipping time refers to the estimated time that it will take to deliver your order after it’s ready to ship (Please note this does not include time to process your order). Shipping time does not commence after your order is put through but begins the moment your order has been processed and is ready to dispatch via the our freight carrier..

1. Major City & Metro Areas (within Australia)

All in stock orders are generally processed on the same day the order was placed on business days for orders received before 12pm. Generally, orders are processed and shipped the same day or next business day.

Orders are typically received 1-6 business days after shipping. For larger packages please allow an extra 1-2 business days for delivery.

If no one is available at your delivery address to accept your order a second delivery may be scheduled or you will be notified that your order can be collected from the nearest depot location.

2. Rural Areas (within Australia)

All orders are generally processed on the same day the order was placed on business days before 12pm.

Generally, orders are processed and shipped the same day or next Business day.

Packages below 2kg are usually received 3-6 business days after shipping. For larger packages please allow an extra 1-2 business days for delivery.

If no one is available at your delivery address to accept your order a second delivery may be scheduled or you will be notified that your order can be collected from the local Australia Post depot.

International Shipping

The price for international shipping is AU$12.95 for orders equal to or below 0.399kg (399grams), and AU$22.95 for orders with a total weight equal to or above 0.4kg (400 grams).

All in-stock orders placed before 12pm AEST (Sydney Time) on business days are generally processed on the same day. Packages are usually received 6-30 business days after shipping. 

If no one is available at your delivery address to accept your order a second delivery may be scheduled or you will be notified that your order can be collected from your nearest delivery depot.

Please note in regards to all orders

– These expected delivery dates/times are based on carrier shipping practices, your destination, and the items in your order.

– Expected delivery dates are estimates. Orders can be delayed due to fraud verification or the time of the order being placed. Items that are not regularly stocked cannot be held to the expected delivery dates.

– Orders may be delivered in separate shipments.

– The order cut off times are based on normal Business Hours and exclude weekends and Holidays: Monday – Friday 12 pm

– When your order ships you will receive an email from us with a link to track your order.  If you receive your tracking number before 6 pm (AEST) it may not be updated on the Carrier’s website until that evening.

Due to large amounts of online credit card fraud, all orders are subject to approval by our payment verification department. We will notify you by phone or email should your order be delayed.

Returns Policy


We have a 14 day return policy, which means you have 14 days after receiving your item to request a refund for any defective products.

Returns and exchanges are only available for faulty items, goods not as described, or in some instances, for incorrect sizing.

Due to health and safety regulations, cockringshop.com.au cannot resell any returned or exchanged products.

This policy is in place to prioritise your well-being and ensure that you receive the highest standard of hygiene and quality in all products.

To be eligible for a refund, your item must be in the same condition that you received it, unworn or unused, with tags, and in its original packaging.

You’ll also need the receipt or proof of purchase. We do not issue refunds for change of mind or incorrect choice.

Under Australian Consumer Law, we are not obliged to accept returns for “incorrect choice” or “change of mind” so please choose your products carefully.

Any freight and insurance costs to return the item to us are at your expense. This includes the liability for any lost freight – send via registered post.

If your return request is accepted, we will provide you with all instructions on how and where to send your package. Items sent back to us without first requesting a return will not be accepted.

Damages and issues

Please inspect your order upon reception and contact us immediately if the item is defective, damaged or if you receive the wrong item, so that we can evaluate the issue and make it right.

Exceptions / non-returnable items

We do not accept returns for any products that have change of mind, damaged products, or for products that have been used or do not have their original packaging.

Please get in touch if you have questions or concerns about your specific item.

Unfortunately, we cannot accept returns on sale items or gift cards.

Refunds

We will notify you once we’ve received and inspected your return, and let you know if the refund was approved or not. If approved, you’ll be automatically refunded on your original payment method within 7 business days.

Please remember it can take some time for your bank or credit card company to process and post the refund

Frequently Asked Questions

How does the Master Series Trillium Steel Locking Anal Plug expand for different sensations?
The expanding mechanism allows diameter adjustment from 4 cm to 5.8 cm after insertion creating intense stretching sensations and customizable fullness for anal stimulation.
Why is the Master Series Trillium Steel Locking Anal Plug effective for extended anal play?
Users experience secure wear through the reliable locking system that prevents removal enabling extended anal stimulation sessions and hands free movement during sexual activities.
What makes the Master Series Trillium Steel Locking Anal Plug suitable for temperature play?
Stainless steel construction conducts heat and cold effectively allowing users to warm or cool the device for enhanced anal sensations and heightened arousal.
Which prostate stimulation benefits does the Master Series Trillium Steel Locking Anal Plug provide?
It delivers targeted prostate massage through its 10.9 cm insertable length and substantial weight creating intense sensations that enhance masturbation and orgasm intensity.
Does the Master Series Trillium Steel Locking Anal Plug work for BDSM control scenarios?
Locking functionality creates power exchange dynamics where partners control removal making it ideal for dominance and submission play involving extended anal stimulation sessions.

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Why Shop With the Cock Ring Shop?

FAST ORDER DISPATCH

We ship same day on all in-stock orders placed before 12pm! Free shipping on all orders above $200.

DISCREET PACKAGING

All of our shipments come in discreet packaging ensuring those nosy neighbours will never know!

INTERNATIONAL SHIPPING

We ship our full range of products worldwide with fast dispatch for orders before 12pm Sydney EST!