MulWark M35 Cobalt Step Drill Bit Set with Center Punch, TiAlN Coated Unibit(1/4-1-3/8), 4 Spiral Flute Hex Shank for Stainless Steel, Metal, Wood, Plastic

Complete Industrial Sizing System：Comprehensive set includes 13-step (1/8-1/2) great for electronics enclosures, 12-step（3/16 to 7/8）suitable for combination of range and density, 9-step (1/4-3/4) for machinery assembly and oversize 4-step (up to 1-3/8) for industrial equipment.,Industrial-Grade Durability：Engineered with premium M35 high-speed steel, our unibit step drill bits withstand rigorous factory production line use. Proven to maintain peak performance through 8+ hours of continuous drilling on hardened steel, stainless steel, and industrial metal sheets - reducing downtime for tool replacement.,89HRC3 Coating for Heavy-Duty Protection：The industrial aluminum nitride coating (89HRC3 hardness) delivers superior heat resistance for extended drilling sessions. Ideal for high-volume stainless steel part manufacturing, maintaining sharpness through 500+ holes to minimize consumable replacement costs.,Precision Engineering for Mass Production：118° split-point design with self-centering action enables rapid hole positioning - perfect for automotive components and machinery parts manufacturing. Hex shank compatibility with all industrial power tools increases production output to 300+ precision holes per shift.,Multi-Process Manufacturing Solution：Four-flute spiral design efficiently clears metal chips during continuous operation. Works seamlessly with HVAC systems, electrical panels, and plumbing installations. Includes magnetic step drill bits for improved metalworking efficiency.