The Borka Tools 65 Inch-Pounds Single Ptl Kit With Screwdriver Bits Kit (PTL0065K3) is a mechanical preset torque limiter tool engineered for firearm hardware installation. Calibrated to ISO-6789 standards within ±4%, the internal ball/cam mechanism delivers a fixed torque limit of 65 inch-pounds in clockwise rotation, slipping once reached to prevent the over-tightening of heavy-duty scope mount crossbolts and chassis action screws. The kit includes a compact torque limiter, a manual ratchet handle, and a 29-piece screwdriver bits kit (SBK) utilizing standard 1/4" hex shanks.

Key Features

• Factory-Preset Calibration: Delivers an exact 65 inch-pounds limit using an internal ball/cam mechanism with calibrated slip operation in clockwise rotation.
• Compact Limiter Body: Measures 0.87 inches in outer diameter and 3.0 inches in length, weighing 3.5 oz for field carry.
• High-Strength Ratchet Handle: The 4.37-inch manual drive handle features a 3/8" square male drive and 1/4" hex female socket, structurally rated up to 250 in-lbs.
• Tool Compatibility: Features a 3/8" square female drive input and 1/4" hex female output compatible with standard 1/4" hex bits and included 29-piece bit kit.
• Mechanical Reliability: Requires no batteries or external power sources, making it fully field-serviceable for remote range or hunting use.

Specifications

• Torque Rating: 65 inch-pounds (in-lbs), clockwise slip mechanism
• Calibration Standard: ISO-6789 (certified to ±4%)
• Limiter Dimensions: 0.87 inches (OD) × 3.0 inches (L)
• Limiter Weight: 3.5 oz (~99 g)
• Handle Length: 4.37 inches
• Handle Maximum Rating: 250 in-lbs
• Drive Interface: 3/8" square female input to 1/4" hex female output
• Power Type: Fully mechanical hand tool

Who is the Borka Tools 65 Inch-Pounds Single Ptl Kit With Screwdriver Bits Kit for?

• Precision rifle shooters installing heavy-duty scope mounts — Secures Picatinny clamp nuts and optic mount crossbolts to an exact 65 inch-pounds limit without over-torquing critical mounting hardware.
• Field hunters maintaining rifle chassis action bolts — Provides a compact preset torque limiter weighing only 3.5 oz with a 0.87 inches diameter profile, delivering precise 65 inch-pounds tension in a field-packable format.

Less suitable for: Fasteners requiring lower values such as 15 to 25 in-lbs or higher values, which require an adjustable driver or a lower-rated preset limiter; motorized, cordless, or pneumatic power drivers at 0 RPM motorized tolerance; or applications requiring smaller bits such as hex bits under 7/64 inch or Torx below T20 with shear thresholds below 65 in-lbs.