The Borka BTK-E1 takes the acclaimed Standard Configuration Kit and expands it for added versatility, longer reach, and specialized applications. Ideal for professional armorers, precision shooters, and serious enthusiasts who demand both accuracy and flexibility. The BTK-E1 includes everything in the Standard Configuration plus three purpose-built, extended-length components for hard-to-reach fasteners: 5/32 Ball-End Hex 4 Long Bit: Perfect for action screws requiring deep access, such as Ruger 10/22 V-block 10-32 clamp screws. 3/16 Ball-End Hex 4 Long Bit (Universal AICS Bit): Custom-engineered for Accuracy International Chassis Systems (Gen 1 & Gen 2) and other platforms using 3/16 hex socket action screws. 4 Long Bit Extension: Slim 0.4 maximum outer diameter for effortless clearance in tight channels. All extended bits are crafted from premium S2 tool steel, hardened to HRc 5860, and designed with ball-end tips for angled access without compromising precision. Complete Kit Contents: Adjustable Torque Driver, Torque calibration accuracy: 4%. Compact Ratchet Handle: 1/4 hex (F) x 1/4 square drive (M). Adapters & Extensions: 1/4 hex drive (F) to 1/4 square drive (F) adapter, 1/4 hex drive (M) to 1/4 square drive (M) adapter, 2 long extension with 1/4 square drive (M and F) ends, 1/2 hex socket with 1/4 square drive (F). Premium S2 Tool Steel Chrome-Plated Bits (29 total): Hex, Inch: 3/32, 7/64, 1/8, 9/64, 5/32, 3/16. Hex, Metric: 2, 2.5, 3, 4, 5, 6. Slotted: 1/8, 5/32, 3/16, 7/32, 1/4, 5/16. Torx: T-10, T-15, T-20, T-25, T-27, T-30. Phillips: #1, #2. Spare Torx Bits: T-10, T-15, T-20 (stored in labeled Special Bits slots SPB#13). Additional Essentials: Mohair lens brush, Cordura nylon pouch (approx. 8 x 5.5 x 2), Instruction guide sheet with quick-start info and links to video guides. Unmatched versatility for firearms maintenance, optics mounting, and field service, Ball-end hex design for angled access and extra reach in confined spaces, Rugged Cordura pouch organizes and protects every component, Built to exacting Borka standards for precision, strength, and longevity, Accuracy and Quality you can count on. Made in the USA with professional-grade materials, Weight: 1 lb. 6 oz.