IRWIN 10220CB STEP DRL COBALT #20 9/16-1″ 8 SZ

Crafted from M35 grade cobalt alloy steel, this step drill bit from IRWIN is engineered for enhanced durability and longevity, boasting a lifespan six times longer than competing options. The precision speedpoint tip allows for smooth initial penetration, while the radial concave flute design efficiently manages chip removal. Featuring laser-marked sizes for easy visibility and accurate drilling, this versatile tool is essential for anyone looking to enlarge holes with precision and reliability. Whether you’re a professional tradesman or a DIY enthusiast, this drill bit addresses a wide range of drilling needs with exceptional performance.