Irwin 10234 Unibit4 3/16-Inch to 7/8-Inch 3/8-Inch Shank Step Drill Bit

Irwin 10234 Unibit4 3/16-Inch to 7/8-Inch 3/8-Inch Shank Step Drill Bit Review

Irwin 10234 Unibit4 3/16-Inch to 7/8-Inch 3/8-Inch Shank Step Drill Bit Feature

• Step drill that produces true, round holes
• Non-skid tip means no need for center punches
• 3 flatted shanks prevent drill chuck slipping
• Made from durable heat-treated molybdenum steel
• Full lifetime warranty

The Irwin 10234 UniBit #4 12-Step High Speed Steel Fractional Self-Starting Step Drill has a single-flute cutting edge to give you more control and produce true, round holes. Twelve holes range from 3/16 to 7/8 inches, in 1/16-inch increments. A non-skid tip does away with the need for center punches, while the three flatted shanks prevent slipping in the drill chuck. This drill is made from industrial-grade high-speed molybdenum steel heat treated for maximum durability, and it is ideal for work on thinner materials. The multiple steps mean you don't have to have a toolbox with specific size drill bits, and this drill is backed by a full lifetime warranty. Hanson Step Drills save time by eliminating the need to change drills when drilling round holes in thin materials. Each smaller size drill also acts as a pilot for the next size. The single radial flute assures perfectly round holes. Use on steel, brass, aluminum and other thin materials. Step Drills are self-starting and will not slip.Drill diameters etched in flute for easy identification.