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 Permanent by Hafren Security Fasteners
The Kinmar Permanent screw is a true one-way fastener designed for permanent installations where no future access is needed. Its unique shape makes unauthorized removal extremely difficult without specialized tooling or destruction. However, its broad, flat top offers limited resistance to physical attacks like grinding or gripping tools. The overall security relies more on deterrence than invulnerability.
Kinmar Permanent
- Permanent Fixtures
- Low-Maintenance Installations
- Visual Deterrence
Kinmar Permanent
- Applications Requiring Maintenance
- High-Tool Exposure Environments
- Resistance to Physical Destruction
Kinmar Permanent
None: One-way design, no driver for removal.
Kinmar Permanent
Not specified; high torque before shearing.
Kinmar Permanent
Not specified; likely moderate (e.g., 100 pieces).
Kinmar Permanent
Extremely high: Permanent, resists all removal attempts.
Kinmar Permanent
$1.62 - $5.35
Kinmar Permanent
Not specified; likely available for bulk orders.
Kinmar Permanent
One-way keyway, shears after installation.
Kinmar Permanent
None: Permanent design, no removal tools.
Kinmar Permanent
Button.
Kinmar Permanent
Steel, stainless steel; A2, A4 options.
Kinmar Permanent
Non-reusable; permanent installation.
Kinmar Permanent
Extremely high: One-way design prevents removal.
Kinmar Permanent
No tools for removal; one-way design.
Kinmar Permanent
Manual or power-driven; shears after installation.
Kinmar Permanent
High: One-way design signals permanence.
Kinmar Permanent
None: No removal tools exist.
Kinmar Permanent
Not specified; likely 1–4 weeks.
Kinmar Permanent
