Milwaukee 48-89-9320 Step Drill Bit 4MM-20MM

This step drill bit from Milwaukee Tool offers a superior solution for those in need of creating multiple hole sizes with precision and efficiency. Engineered with a 3-Flat Secure-Grip™ shank, it significantly reduces slippage in the chuck, ensuring a stable drilling experience. Crafted from high-speed steel and featuring an advanced optimized geometry with a Black Oxide coating, the bit delivers an impressive lifespan—up to four times longer than traditional options—while cutting faster and generating less heat.