Borka® bits are made of S2 tool steel and are known for exceptional toughness and resistance to breakage.
 
Common Firearms Applications for Hex 1/16″
The 1/16-inch hex bit is one of the most widely used small Allen sizes in firearms maintenance and modification. It strikes a balance between strength and precision, making it ideal for a variety of sighting and control components.
 
1. Handgun Sight Adjustment
Application:
Loosening/tightening rear sight set screws (especially in dovetail-style adjustable or drift sights).
Commonly used during zeroing or changing sights.
Firearms: Most prominent in Glock, Smith & Wesson M&P, Sig Sauer, and CZ platforms.
Purpose: Enables secure mounting while still allowing for adjustments and windage correction during sight-in.
2. Retention Screws in Modular Optic Systems (MOS Plates)
Application: Securing optic adapter plates or mini red dot sights (MRDS) to pistol slides.
Systems:
Glock MOS (Modular Optic System)
Sig P320 RX/Pro Cut slides
Walther PDP and Canik optic-ready pistols
Sights: Frequently used with Trijicon RMR, Holosun, Leupold DeltaPoint, and similar optics.
Why 1/16″?: Provides sufficient engagement to handle recoil forces without stripping, while maintaining low-profile installation.
3. Trigger and Safety System Adjustments
Application:
Fine-tuning trigger shoe position
Setting overtravel/pre-travel limits
Adjusting manual safety detents or spring tension
Aftermarket Brands:
Timney
Zev Technologies
Apex Tactical
Agency Arms
Platforms: AR-style pistols, custom Glock triggers, and other modular systems