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tamper proof key rings
Tamper-Proof Key Rings®


Tamper-Proof Key Rings®

the industry standard among security professionals

Strict tolerances provide you with the ultimate in strength and durability. Key Systems, Inc patented Tamper-Proof Key Ring® technology provides your keys and your most valuable assets with an added layer of protection. These high-security stainless steel rings, once sealed, cannot be opened without detection thus preventing key or asset removal or substitution. They may serve on their own as a high strength key ring or in conjunction with your mechanical or electronic key management system.

As a one time use security device, our rings verify that items removed from a safe match the items returned to that safe. Tamper-Proof Key Rings® come in five different sizes of solid or flexible style and are used to secure assets from keys and utility knives to medical equipment and cash tills.

Tamper-Proof Key Rings® is a registered trademark of Key Systems, Inc

An image of both solid and flexible Tamper-Proof key rings

Some of our Valued Customers

Our Tamper-Proof Key Rings® are widely used by the NHS and Healthcare sectors, by the Diplomatic and Defense services, the Prison sector and the Security services, the Logistics industry, and other sectors where security of keys and other assets is of paramount importance.


Solid Stainless Steel
Tamper-Proof Key Rings®

 Key Ring Specifications

A solid Tamper-Proof key ring sealing a key in a key management system

Stranded Stainless Steel Flexible
Tamper-Proof Key Rings®

Solid Stainless Steel4 mm ring thickness
Stranded Stainless Steel2.6 mm cable, 4 mm seal
DiameterKey Capacity (In terms of standard builders hardware)
1″ (2.5 cm)14
1.625″ (4.1 cm)22
2″ (5 cm)28
3″ (7.62 cm)46
4″ (10.1 cm)66


Colour Coded Control

A group of flexible Tamper-Proof key rings

Each size of Tamper-Proof Key Ring® is available in both solid and flexible braided stainless steel. The solid rings require our closing tool to align the ring prior to sealing. Both solid and flexible rings are sealed with the same Crimping Tool. Both types of rings can be cut using the optional Cutting Tool. This is especially useful in secure environments where the presence of bolt cutters breaches security rules. 

colour coding for both solid and flexible Tamper-proof key rings

The only plastic we use with our Tamper-Proof Key Rings® is the color-coded tags. Five colors are available to help group key rings for quick identification.

Unique Identity

No two key rings are alike and are uniquely identified by a permanent serial number. Each ring is engraved before distribution to allow for detection in the event it is tampered with or replaced.

Detail of the unique Tamper-Proof key ring identity

Smooth Seal

Our crimping tool closes both solid and flexible rings with a smooth seal. This allows for a 360-degree use of each ring without the hindrance of a raised seal.

An image showing the Tamper-proof key ring seal which allows smooth key or asset travel arround the key ring

The Toolset

Key Security Products provide the toolset required to ensure that you can manage your Tamper-Proof Key Rings® and maintain the security of your assests.  These three unique tools prevent the substitution of alternative key rings. The toolset includes a special Closing tool required to close the Solid keyrings prior to sealing and a Sealing tool that is required to seal both the Solid and Flexible key rings. There is also a special Cutting tool for use in environments where bolt cutters would be a security risk.

The solid Tamper-Proof key ring closing tool


Closing Tool

Closes and holds the solid rings shut in preparation for crimping.

The Tamper-Proof key ring sealing tool for solid and flexible key rings


Crimping Tool

Clamps down to create our smooth seal on both solid and flex rings.

The special Tamper-Proof key ring cutting tool


Cutting Tool

Used to permanently cut open the key rings seal in order to remove any keys or assets. Ideal in environments where standard cutting tools e.g.; bolt cutters, could breach security rules.

Download the Tamper-Proof Key Rings® brochure.

Download the Tamper-Proof Key Rings® Instructions.