Master Series Ass Vault Locking Anal Expander

Master Series Ass Vault Locking Anal Expander with Adjustable Stainless Steel Petals in Canada

The Master Series Ass Vault Locking Anal Expander is an advanced stainless steel expanding butt plug designed for experienced users exploring controlled anal stretching and consensual bondage play. Inserted in its compact position, the tapered plug can then expand from approximately 1.5 inches to 2.2 inches in diameter using the included circular adjustment key. A separate locking mechanism can hold the selected expansion in place, while the slim neck and broad base help maintain safer positioning. Made from substantial, non-porous stainless steel and weighing approximately 264 g, Ass Vault is available in Canada from Discreet Life for advanced anal and power-exchange exploration.

Discover more specialized restraint and advanced pleasure equipment from Master Series in Canada, including premium metal toys, chastity devices and specialty equipment for experienced play.

Expands from 1.5 to 2.2 Inches

The stainless steel petals begin together at approximately 1.5 inches in diameter and can gradually expand to approximately 2.2 inches. The circular adjustment key allows the user to control the amount of expansion rather than relying on one fixed plug size.

Separate Locking Mechanism

Once the preferred expansion has been reached, the supplied gold locking-pin system can secure the mechanism in that position. Because release requires the appropriate keys, both keys should remain immediately accessible whenever the device is in use.

Weighted Stainless Steel Construction

The plug alone weighs approximately 264 g, giving it a noticeably substantial feel compared with lightweight silicone or TPE plugs. Stainless steel is non-porous, durable and naturally temperature-responsive.

Tapered Tip, Slim Neck & Wide Base

The tapered leading edge supports more gradual entry while the narrower neck allows the sphincter to settle around the device. A broad base remains outside the body and provides an essential retrieval and retention point.

Key Features

• Advanced locking anal expander / expanding butt plug
• Adjustable stainless steel petal design
• Expands from approximately 1.5 to 2.2 inches in diameter
• Separate expansion and locking mechanisms
• Tapered tip for progressive insertion
• Slim neck and broad anal-safe base
• Non-porous stainless steel construction
• Nickel-free metal
• Temperature-responsive material
• Compatible with all lubricant types according to supplied specifications
• Approximately 264 g plug weight

Compare Master Series Expanding Anal Toys

Ass Vault offers the smallest maximum expansion of this group but is the only design with a dedicated locking mechanism. The alternatives below provide greater expansion ranges or different materials and adjustment systems.

Explore More Anal Toys & Expanders

Ass Vault combines the familiar retention shape of a butt plug with an adjustable expansion mechanism. Browse anal butt plugs for more fixed-size and wearable designs, or explore the broader anal-toy collection when comparing plugs, training toys, dilators and other advanced anal products.

• Anal Butt Plugs
• Anal Sex Toys

Pairs Well With

Generous lubrication is particularly important with rigid expanding anal toys because the anus does not self-lubricate and expansion increases surface pressure. A dedicated cleaner also helps maintain the non-porous steel before and after use.

• Anal Sex Lubricants
• Sex Toy Cleaner

Technical Specifications

• Product Type: Locking expanding anal plug / anal dilator
• Material: Stainless steel
• Overall Length: 3.4 inches
• Insertable Length: 2.8 inches
• Diameter Range: Approximately 1.5–2.2 inches
• Weight: Approximately 264 g (9.3 oz)
• Expansion: Adjustable metal petals
• Locking: Separate gold locking-pin mechanism
• Base: Wide flared base
• Surface: Non-porous
• Material Note: Nickel-free
• Lubricant Compatibility: All lubricant types according to supplied specifications

How to Use Safely

• Inspect the plug, adjustment mechanism and both keys before every use.
• Begin only with the petals fully contracted.
• Apply a generous amount of compatible anal lubricant.
• Insert slowly and allow the body to relax around the smallest setting before considering expansion.
• Increase the diameter gradually and stop immediately if there is sharp pain, numbness or excessive pressure.
• If using the locking function, keep both the expander key and release key immediately accessible.
• Return the plug to its smallest position before removal.
• Clean thoroughly before and after every use.

Advanced-use safety: Never force expansion, leave a mechanically expanded device unattended or continue through sharp pain. Locking an internal device adds release risk, so the appropriate keys must remain immediately available throughout the session.

Trust & Discretion

Discreet Life ships throughout Canada in plain, unbranded packaging with no sensitive product information displayed on the exterior. Orders are processed through secure checkout for privacy from purchase through delivery.

FAQ

How far does the Ass Vault expand?
The supplied measurements list an adjustable diameter from approximately 1.5 inches when contracted to 2.2 inches when expanded.

Is the Ass Vault suitable for beginners?
No. The rigid steel construction and mechanical expansion system make it better suited to experienced anal-toy users who already understand gradual stretching and body feedback.

What are the two keys for?
One circular key controls expansion and contraction, while the separate locking system can secure the chosen expansion position.

Can I use silicone lubricant?
Yes. The supplied specifications state that the stainless steel device is compatible with all lubricant types.