The Milwaukee Step Drill 48899320 drills and enlarges holes from 4 mm to 20 mm with a single bit, making it a versatile solution for sheet metal, stainless steel, aluminium, plastics and more. Precision‑engineered with a RAPID STRIKE™ tip to start without walking, dual‑flute geometry for smoother cutting and a durable black‑oxide finish for extended life, this step drill delivers clean, burr‑free holes and reliable performance. Laser‑engraved size markings and a secure‑grip 3‑flat shank ensure easy identification and stable torque transfer during high‑speed drilling.