MulWark Four Spiral Flute Cobalt Step Drill Bit

MulWark Four Spiral Flute Cobalt Step Drill Bit

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. Crafted from M35 cobalt steel with TiAlN coating for drilling hardened metals like stainless steel and alloys. Features 4-spiral flutes for efficient chip removal and 3/8" hex shank for drill compatibility. Includes 19 sizes (1/8" to 1-3/8") for versatile applications - from electronics to piping. Industrial durability with lifetime warranty.