The unibit is fantastic for putting holes in thinner material. A plus is the hole will be deburred on the side you are drilling from. When drilling stainless steel (my experience was with 1/8" 316 ss) be careful toreduce RPM as each step goes through. It can work harden the materialeasily, and ruin the bit. A definate "MUST HAVE" for working withelectrical enclosures and panels as well as sheet metal. Just don't throwaway your normal twist drills.Click Here to see more reviews about: Irwin 10234 Unibit4 3/16-Inch to 7/8-Inch 3/8-Inch Shank Step Drill Bit
Product Description:
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.
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