KEY-REX by Bryce Fastener

Manufacturer Claim

The most secure, tamper-proof screw and bolt on the market. Patented worldwide. Designed to simply not be removed by anyone but the owner — ever. Not available in any store.

Exclusive keyway per customer
Low profile head
Custom torque grip via "Raptor Claw"

What We Thought

The KEY-REX by Bryce Fastener stands out as the top choice among security fasteners, excelling across multiple evaluation factors. Offering top-tier tamper-proof security with a globally patented design concept that restricts removal to the owner alone. Unavailable in stores, its specialized approach shines.

Good For

High Value Applications
High Risk/Liability Applications
Isolated Installations (more time to circumvent)

Not Good For

DIY Projects
If you need it today
3rd Party Installation

See Why

Product Facts

We compiled these "product facts" using publicly available information, expert analysis, and reasonable assumptions where data was incomplete. Some details (like pricing, torque specs, and break-in times) aren’t always disclosed, so we’ve filled in the gaps as accurately as possible.

For verified specs or specific use-case guidance, we recommend reaching out directly to the manufacturer.

Feature: Value
Driver Availability: Restricted: Custom driver bits, unique to each customer, not sold in stores. Controlled via serialized database.
Maximum Torque (MFR Claim): ~136 in/lbs for 1/4-20x1 and ~140 in/lbs with Raptor Head.
Minimum Quantity: 2,500 piece minimum, smaller minimum for large bolts.
Average Break-In Time: Extremely high: “Nearly impossible” without custom bit; rare breaches take significant time.
Cost Per Fastener: $0.60 - $16.00. Varies by size, quantity, and material. Plus a one time licensing fee.
Samples Available: Not stated; custom design implies possible samples.
Keyway Type: Custom-encrypted, 53 billion variations, unique per customer.
Tool Control: Strict: Serialized bits, tracked, restricted to original purchaser. Verification for replacements.
Head Style Options: Button, flat, socket, customizable with Raptor™ head.
Material Options: 302 and 316 stainless steel. 8740 Alloy, heat-treated alloys and custom coatings.
Reusability: Reusable with matching bit; high torque maintains integrity.
Tamper Resistance: Extremely high: Repels Vice-Grips, drills; sloped head, large rejection pins.
Tool Compatibility: Requires custom Key-Rex® bit; incompatible with standard bits (Torx, Hex).
Installation Method: Power-driven or manual with custom bit.
Visual Deterrence Level: High: Low-profile, sloped heads signal difficulty; custom keyway exclusivity.
Removal Risk if Tool Leaks: Low: 53 billion keyway variations, strict bit control.
Lead Time to Purchase: 4-6 weeks.

About The Manufacturer

Founded in 1972, Bryce Fastener, Inc., opened its doors as a fastener distributor in Seattle, WA. For the next 20 years, Bryce provided manufacturers, retail stores and other businesses with all types of screws, bolts, and nuts.

By the early 1990s, the more popular types of tamperproof fasteners were no longer being produced by American manufacturers. With the help of WSR Manufacturing, the first prototype of our Key-Rex® drive was developed. This was a clear turning point—Bryce Fastener needed to further develop and perfect security screws, bolts, and nuts.

By re-engineering cold-forging machines, developing new manufacturing techniques and processes, Bryce Fastener has set a new standard, both in security innovation and in the way security fasteners are made. Today, the talented team at Bryce Fastener are true American craftsmen, producing the most secure fasteners in the world.

Where to Buy

All set to buy the KEY-REX by Bryce Fastener? No worries, we are here to sort this out for you.

Not Available in stores.
Order directly from the manufacturer.

Get Pricing on brycefastener.com

Or call (480) 503-3801

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