The Milwaukee Step Drill Bit 4‑20 mm (1 pc), model number 48899320, is engineered for multi‑size drilling in sheet metal, pipes, plastics, and other materials. With its step geometry, this bit allows you to drill multiple diameters using a single tool. The robust design and features make it suitable for professionals seeking versatility, precision, and durability in one drill bit.

Features & Specifications

• Single piece step drill covering sizes from 4 mm to 20 mm

• 9 steps (increments)

• Constructed from high‑speed steel

• Black oxide coating for corrosion resistance

• Rapid Strike tip to reduce walking and help start holes accurately

• Laser-etched markings for easy hole size identification

• 3‑flat shank (Secure‑Grip) to prevent slipping in the chuck

• Suitable for ferrous and non-ferrous sheet metals, copper, brass, aluminum, stainless steel, plastics

• Maximum material thickness: ~4 mm

• Designed for both manual drills and impact drivers