Security Fastener
Our Thoughts
Good For
Not Good For
Driver Availability
Maximum Torque (MFG Claim)
Minimum Quantity
Average Break-In Time
Cost Per Fastener
Samples Available
Keyway Type
Tool Control
Head Style Options
Material Options
Reusability
Tamper Resistance
Tool Compatibility
Installation Method
Visual Deterrence Level
Removal Risk if Tool Leaks
Lead Time to Purchase
Where to Buy
KEY-REX by Bryce Fastener
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.
KEY-REX
- High Value Applications
- High Risk/Liability Applications
- Isolated Installations (more time to circumvent)
KEY-REX
- DIY Projects
- If you need it today
- 3rd Party Installation
KEY-REX
Restricted: Custom driver bits, unique to each customer, not sold in stores. Controlled via serialized database.
KEY-REX
~136 in/lbs for 1/4-20x1 and ~140 in/lbs with Raptor Head.
KEY-REX
2,500 piece minimum, smaller minimum for large bolts.
KEY-REX
Extremely high: “Nearly impossible” without custom bit; rare breaches take significant time.
KEY-REX
$0.60 - $16.00. Varies by size, quantity, and material. Plus a one time licensing fee.
KEY-REX
Not stated; custom design implies possible samples.
KEY-REX
Custom-encrypted, 53 billion variations, unique per customer.
KEY-REX
Strict: Serialized bits, tracked, restricted to original purchaser. Verification for replacements.
KEY-REX
Button, flat, socket, customizable with Raptor™ head.
KEY-REX
302 and 316 stainless steel. 8740 Alloy, heat-treated alloys and custom coatings.
KEY-REX
Reusable with matching bit; high torque maintains integrity.
KEY-REX
Extremely high: Repels Vice-Grips, drills; sloped head, large rejection pins.
KEY-REX
Requires custom Key-Rex® bit; incompatible with standard bits (Torx, Hex).
KEY-REX
Power-driven or manual with custom bit.
KEY-REX
High: Low-profile, sloped heads signal difficulty; custom keyway exclusivity.
KEY-REX
Low: 53 billion keyway variations, strict bit control.
KEY-REX
4-6 weeks.
KEY-REX
Kinmar Removable by Hafren Security Fasteners
The Kinmar® Removable fastener offers a flexible tamper-resistant option for low-risk applications, but its design leaves critical vulnerabilities. The flat top makes it easier to grip with locking pliers or attack with rotary tools, and although the manufacturer claims the driver socket is restricted, it can be found online for around $170—undermining the intended access control. Its use is best limited to low-value or controlled environments where convenience outweighs high security.
Kinmar Removable
- Low-Value Theft Prevention
- Controlled Access Environments
Kinmar Removable
- High-Value Theft Protection
- High-Frequency Removal
- Large-Scale Projects
- Applications Requiring Sizes Outside M6–M12
Kinmar Removable
Restricted: Specialist tooling, available only from Hafren approved distributors.
Kinmar Removable
Not specified; high torque for removable security.
Kinmar Removable
Not specified; likely moderate (e.g., 100 pieces).
Kinmar Removable
High: Requires specialist tooling, resists standard bits.
Kinmar Removable
$2.04 - $6.95
Kinmar Removable
Not specified; likely available for bulk orders.
Kinmar Removable
Patented two-indent keyway, resists standard bits.
Kinmar Removable
Controlled: Specialist tooling restricted to approved distributors.
Kinmar Removable
Button, countersunk.
Kinmar Removable
Steel, stainless steel; A2, A4 options.
Kinmar Removable
Reusable with Kinmar® tooling; designed for secure removal.
Kinmar Removable
High: Patented keyway enhances tamper resistance.
Kinmar Removable
Requires Kinmar® specialist tooling; incompatible with standard bits.
Kinmar Removable
Manual or power-driven with Kinmar® tooling.
Kinmar Removable
Moderate: Two-indent design signals security but less unique.
Kinmar Removable
Moderate: Restricted tooling reduces risk, but not bespoke.
Kinmar Removable
Not specified; likely 1–4 weeks. Contact Hafren.
Kinmar Removable
