Borka® Combination Kit – Precision Edition (#BCK-MX)
 
Ultra-Precise Torque for Optics & Turrets – The Borka® BCK-MX combines the proven versatility of our Extended Configuration (BTK-E1) with dedicated low-range torque limiters for the most delicate precision-scope adjustments. Designed for professional shooters, gunsmiths, and optics technicians who demand repeatable, accurate results every time.  
 
Complete Professional Kit
The BCK-MX includes all the components of the BTK-E1—including extended hex bits and bit extension—plus 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.

Important Configuration Note
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 bit—selected specifically for compatibility with the low-torque limiters.

Built on the Borka® BTK-E1 Foundation, Like the BTK-E1, the BCK-MX features:
 
BTD1070-IP Adjustable Torque Driver – Made in the U.S.A.; ±4% calibration accuracy; Patent #8,667,870 / Second Patent Pending
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
Accuracy and Quality You Can Count On – BTD1070-IP and PTLs built for precise, repeatable torque
Made in the USA – Engineered with professional-grade materials and craftsmanship
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.