Borka Blades Combination Tool Kit. Designed for professional shooters gunsmiths and optics technicians who demand repeatable accurate results every time. The BCK-MX includes all the components of the BTK-E1including extended hex bits and bit extensionplus a specialized precision torque package: 4 inch-lbs. Precision Torque Limiter (PTL) 8 inch-lbs. Precision Torque Limiter (PTL) PTL Gear for seamless use with the included PTLs. These low-range PTLs provide the perfect solution for scope zero-stop and elevation/windage turret screws delivering consistent delicate torque without risk of over-tightening. To accommodate the 4 inch-lbs. PTL one spare T-20 Torx bit from the BTK-ST bit set has been replaced with a 5/64" hex bitselected specifically for compatibility with the low-torque limiters. Built on the Borka BTK-E1 Foundation Like the BTK-E1 the BCK-MX features: Adjustable Torque Driver 4percent calibration accuracy Compact Ratchet Handle 1/4" hex (F) x 1/4" square drive (M) Adapters & Extensions for maximum flexibility Extended-Length Custom Bits 5/32" and 3/16" ball-end hex 4" long bits with 4" slim bit extension 29 S2 Tool Steel Chrome-Plated Bits (Hex Metric Slotted Torx Phillips plus labeled spare bits) Mohair Lens Brush and Cordura Nylon Pouch (approx. 8" x 5.5" x 2") Instruction Guide Sheet with quick-start info and video links. Key Advantages: Specialized for Optics Perfect for fine scope turret installation zero-stop adjustments and maintenance All-in-One Portability Compact rugged Cordura case keeps everything organized for field or bench use Kit Approximate Weight: 2 lb. 3 oz. Specifications for Borka Blades Combination Kit: Manufacturer: Borka Blades Weight: 35 oz BORKA BCK-MX COMBINATION KIT BCKMX Borka Blades BCK-MX: Combination Tool Kit