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
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
Ultra-Lok II by Loss Prevention Fasteners
The Ultra-Lok II® features a proprietary keyway with a robust center stud, adding strong protection against tampering with standard tools. Tools are restricted and require authorization to purchase, increasing control—but not eliminating the possibility of eventual tool access. The button head design also limits grip area for pliers, especially when paired with proper torque. Minimum order quantities may limit use for small projects, but this fastener offers solid mid-tier security where distribution control is important.
Ultra-Lok II
- Commercial & Municipal Use
- Tamper Resistance with Controlled Tool Access
- Button Head Installations
Ultra-Lok II
- Projects Needing Unique Keyways per User
- Small-Scale or One-Off Installs
Ultra-Lok II
Restricted: Tools not available to the public
Ultra-Lok II
Not specified; likely moderate, similar to standard Torx-Pin or Hex-Pin.
Ultra-Lok II
Not specified; likely moderate (e.g., 100 pieces).
Ultra-Lok II
Not specified; likely high due to proprietary keyway.
Ultra-Lok II
Not specified.
Ultra-Lok II
Not specified; likely available for bulk orders.
Ultra-Lok II
Unique oval shape with fins and a center pin.
Ultra-Lok II
Controlled: Bits restricted, but control is unknown.
Ultra-Lok II
Not specified.
Ultra-Lok II
Not specified.
Ultra-Lok II
Reusable with matching bit; depends on drive type.
Ultra-Lok II
High: Complex keyway resists standard tools, but less data on advanced attacks.
Ultra-Lok II
Requires proprietary driver; incompatible with standard tools.
Ultra-Lok II
Manual or power-driven with proprietary driver.
Ultra-Lok II
High: Unique design signals advanced security.
Ultra-Lok II
Moderate: Controlled bits reduce risk.
Ultra-Lok II
Not specified; likely stock items ship quickly.
Ultra-Lok II
