The Borka Tools Precision Torque Limiter Kit for Nightforce & Vortex (PTL004008K2) is a specialized mechanical hand-tool set calibrated to prevent stripping delicate miniature set screws and damaging internal scope turret tracking assemblies. Operating via a manual, non-powered mechanical slip mechanism, this kit provides factory-preset tightening limits specifically matched to the low-torque requirements of high-end tactical rifle optics. Each limiter body weighs 3.5 oz (approximately 99.2 g), measures 0.87 inches in outer diameter by 3.0 inches in length, and interfaces with standard 1/4-inch hex drive hardware.

Key Features

• Factory-Preset Calibration: Calibrated under ISO-6789 procedures with fixed 4 inch-lbs and 8 inch-lbs torque limiters for precision scope maintenance without manual adjustment errors.
• Dual-Direction Slip Mechanism: Designed for clockwise (CW) precision torque tightening, with an integrated counter-clockwise (CCW) limiter to protect internal spring-and-ball components during screw loosening.
• Ergonomic Finger-Drive Interface: Includes a knurled PTL GEAR finger-drive adapter sleeve that fits standard 1/4-inch female hex drives for controlled low-torque tightening without oversized leverage handles.
• Complete Field Kit: Supplied with 5 long 1/4-inch shank screwdriver bits and an impact-resistant hard storage case lined with custom foam.

Specifications

• Torque Thresholds: 4 inch-lbs and 8 inch-lbs (preset, non-adjustable)
• Drive Size: Standard 1/4-inch female hex
• Limiter Dimensions: 0.87 in (OD) × 3.0 in (L)
• Limiter Weight: 3.5 oz (~99.2 g) per unit
• Operation Mode: Manual mechanical (no batteries, 240V power, or electrical certifications required)
• Optic Compatibility: Calibrated for turret set screws and zero-stop mechanisms on Nightforce (4 in-lbs) and Vortex (8 in-lbs) tactical optics

Who is the Borka Tools Precision Torque Limiter Kit for?

• Long-range precision rifle shooters adjusting Nightforce or Vortex scope turrets — utilizes fixed 4 inch-lbs and 8 inch-lbs torque limiters to safely set zero-stops and turret caps without stripping miniature imperial or metric set screws.
• Precision rifle competition shooters mounting and zeroing tactical optics — provides a portable precision torque limiter kit featuring 3.5 oz limiters and standard 1/4-inch hex drive bit compatibility for consistent, field-ready turret adjustments.

Less suitable for: Scope ring cap screws requiring 15 to 20 in-lbs, optic base or Picatinny clamp crossbolts requiring 30 to 65 in-lbs, rifle action screws requiring 45 to 65 in-lbs, or any motorized drivers and drills; these applications require higher-range adjustable manual torque drivers (10–70 in-lbs).