Libraton M35 Cobalt Step Drill Bit 1/8"-1/2", Four Spiral Flute Unibit

4-Flute Turbo-Cutting System: Engineered with advanced quad-spiral grooves, this step bit enables 40% faster chip evacuation than 2-flute competitors. This superior geometry eliminates jams and ensures a smooth, continuous cutting action even in tough materials.

Military-Grade M35 Cobalt Core: Forged from high-performance HSS with 5% Cobalt alloy, this bit is designed to withstand extreme heat up to 1,450°F. It offers a 3X longer lifespan than standard HSS bits, making it the premier choice for hardened steel, copper alloys, and carbon fiber composites.

Nano-AlTiN Armor Coating: Features a premium Aluminum Titanium Nitride (AlTiN) coating with a surface hardness of 89HRC. With an ultra-low 0.45 friction coefficient, it provides professional-grade wear resistance that significantly outlasts traditional TiN coatings.

High-Torque 1/4" Hex Shank: Equipped with a standard 1/4-inch hex shank for instant compatibility with impact drivers and power drills. The integrated anti-slip grooves ensure a secure grip, preventing chuck slippage even under a high torque of 35N·m.

13 Precision Step Sizes: A single, high-efficiency tool that covers 13 essential diameters: 1/8, 5/32, 3/16, 7/32, 1/4, 9/32, 5/16, 11/32, 3/8, 13/32, 7/16, 15/32, and 1/2. Perfect for precise, incremental hole enlarging.

Convenient Storage Holder: Includes a dedicated storage holder to keep the precision-milled cutting edges protected from damage and organized in your workshop or tool bag.