TiN Step Drill Bit 1/4-1-3/8 in, 1/2 in Hex Shank, Self-Starting

The IRWIN Unibit #5 Step Drill Bit is a professional-grade tool engineered for drilling precise, perfectly round holes in thin materials such as mild steel, copper, aluminum, and plastics. This bit features a Titanium Nitride (TiN) coating that provides exceptional heat resistance and extends cutting life up to six times longer than standard high-speed steel. The self-starting SpeedPoint tip ensures rapid penetration without the need for center punching, while the single-flute cutting edge offers superior control and reduced vibration. Equipped with a 1/2-inch hex shank to prevent slipping in the chuck, it provides 10 hole sizes ranging from 1/4 inch to 1-3/8 inches.

Unibit Step Drill, Self-Starting, 1/4 - 1-3/8 in Diameter, 3-1/8 in Overall Length, 10 Steps, 1/8 in Step Depth, 1 Flutes, 1/2 in Shank, Hexagonal Shank, Speed Point, High Speed Steel, Titanium Nitride Coated, Applicable Materials: Stainless Steel, Copper, Brass, Aluminum, Plastic, Laminates