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
PENTA-PLUS by Bryce Fastener
Penta-Plus™ screws offer a robust tamper-resistant solution with a proprietary pentagon drive designed to resist standard tamper-resistant bits. The low-profile button head design deters gripping tools like locking pliers, and the optional Raptor™ Claw feature enhances torque resistance by embedding into the substrate. While the drive pattern is proprietary and bits are controlled by Bryce Fastener, the lack of unique keyways per customer may limit their suitability for applications requiring the highest level of security.
PENTA-PLUS
- Commercial Installations
- Municipal Infrastructure
- Situations Requiring Enhanced Tamper Resistance
PENTA-PLUS
- High-Security Applications Requiring Unique Keyways
- Installations Demanding Maximum Tamper-Proofing
- DIY Projects or Immediate Availability Needs
PENTA-PLUS
Restricted: Proprietary Penta-Plus™ bits, only available to Bryce customers, controlled via database.
PENTA-PLUS
132 in/lbs for ¼-20x1. Raptor™ head adds 20% more torque.
PENTA-PLUS
2,500 piece minimum, smaller minimum for large bolts.
PENTA-PLUS
Very high: Resists Torx-Pin, Hex-Pin; requires proprietary bit.
PENTA-PLUS
$0.50 - $15.00. Varies by size, quantity, and material.
PENTA-PLUS
Not stated; likely available for custom orders.
PENTA-PLUS
Pentagon-based, resists standard tamper-proof bits.
PENTA-PLUS
Strict: Bits exclusive to Bryce customers, controlled distribution.
PENTA-PLUS
Button, flat, socket, set screws; customizable with Raptor™ head.
PENTA-PLUS
302 and 316 stainless steel. 8740 Alloy, heat-treated alloys and custom coatings.
PENTA-PLUS
Reusable with Penta-Plus™ bit; high torque maintains integrity.
PENTA-PLUS
Very high: Pentagon design repels standard tools.
PENTA-PLUS
Requires Penta-Plus™ bit; incompatible with standard bits.
PENTA-PLUS
Power-driven or manual with Penta-Plus™ bit.
PENTA-PLUS
High: Pentagon design signals advanced security.
PENTA-PLUS
Low: Controlled bit distribution reduces risk.
PENTA-PLUS
4-6 weeks, stock items faster.
PENTA-PLUS
