LIBRATON Four Spiral Flute Step Drill Bit, M35 Cobalt Unibit Step Drill Bit Set 1/8"-1/2", AlTiN Coated Step Bits, Four Spiral Flute, 1/4" Hex Shank for Metal, Stainless Steel, Aluminum, Plastic

Features

• 4-Flute Turbo-Cutting System: Libraton step drill bit set has quad spiral grooves enabling 40% faster chip evacuation than 2-flute competitors, eliminating jams when drilling.
• Military-Grade M35 Cobalt Core: Our step drill bit for metal is of 5% cobalt alloy withstands 1,450°F heat - 3X lifespan vs normal HSS bits. Perfect for hardened steel, copper alloys, and carbon fiber composites.
• Nano-AlTiN Armor Coating: The unibit step drill bit is of 89HRC-rated surface with 0.45 friction coefficient outlasts TiN coatings.
• Universal 1/4" Hex Shank: Each step bit has instant compatibility with multiple tools. Anti-slip grooves prevent chuck slippage even under 35N·m torque.
• Multiple Step Sizes: The step drill sizes including 1/8 5/32 3/16 7/32 1/4 9/32 5/16 11/32 3/8 13/32 7/16 15/32 1/2. The step drill bit includes a storage holder, easy to store and carry.