The Borka Tools Kit (Standard Configuration) With 3pc. Extension Bit Set (BTK-E1) is a portable, 100% mechanical torque-driver toolkit designed for field maintenance and precision firearms assembly. Centred on the BTD1070-IP adjustable torque driver, the kit applies exact torque to optic rings, scope base screws, action screws, chassis bolts, and rail accessories without stripping threads or crushing delicate optic tubes. The entire kit packs into a rugged 8" × 5.5" × 2" (approx. 20.3 cm × 14.0 cm × 5.1 cm) Cordura nylon pouch and requires no batteries or electrical power.

Key Features

• Adjustable Torque Range: Delivers 10 to 70 inch-pounds (in-lbs) of torque, adjustable in precise 1 in-lb increments with factory calibration to ±4% accuracy.
• Specialised 3-Piece Extension Set: Includes a 4" long 3/16" ball-end hex bit (Universal AICS bit), a 4" long 5/32" ball-end hex bit, and a 4" slim bit extension (0.4" max OD) to access deeply recessed action screws, such as Accuracy International Chassis Systems (AICS Gen 1 & 2) and Ruger 10/22 V-blocks.
• Hardened Driver Bits: Contains 29 chrome-plated S2 tool steel bits hardened to HRc 58–60, covering Torx (T-10 through T-30, with dedicated spares), Imperial hex, Metric hex, slotted, and Phillips (#1, #2) fasteners.
• Drive Hardware & Fastener Support: Features a compact ratchet handle (1/4" hex female × 1/4" square drive male), 1/4" hex-to-square adapters, a 2" square drive extension, and a 1/2" hex socket (1/4" square drive female) for optic base nuts.
• Field Utility Accessories: Includes a 4-corner snap-up parts containment tray measuring 5" × 7" × 1" and a mohair lens cleaning brush.

Specifications

• Torque Adjustment Range: 10 to 70 in-lbs (approx. 1.13 to 7.91 Nm)
• Torque Accuracy: ±4%
• Bit Material & Hardness: S2 tool steel, HRc 58–60 (chrome-plated)
• Drive Interfaces: 1/4" hex and 1/4" square drive
• Pouch Dimensions: Approx. 8" × 5.5" × 2" (20.3 cm × 14.0 cm × 5.1 cm)
• Pouch Material: Cordura nylon
• Power Requirement: None (manual mechanical operation)

Who is the Borka Tools Kit (Standard Configuration) With 3pc. Extension Bit Set for?

• Precision rifle competitors mounting optics in the field — secures optic rings and base mounts on the firing line using an adjustable torque driver accurate to ±4% across a 10 to 70 in-lbs range.
• Hunters maintaining chassis-system rifles in remote terrain — reaches recessed action screws through chassis skins via the 4" long ball-end extension bits, driving fasteners using S2 tool steel bits hardened to HRc 58–60.
• Gunsmiths requiring portable torque control for bench and field work — provides calibrated 1 in-lb incremental adjustments between 10 to 70 in-lbs in a compact 8" × 5.5" × 2" toolkit, replacing bulky individual bench drivers for mobile firearm servicing.

Less suitable for: Fasteners requiring over 70 in-lbs of torque (such as barrel installations, heavy muzzle devices, or receiver extension castle nuts), which require a 3/8" or 1/2" drive heavy-duty mechanical torque wrench, or delicate assemblies requiring under 10 in-lbs that fall below this driver's calibrated range.