Irwin 10232 Unibit 3/16-Inch to 1/2-Inch 1/4-Inch Shank Step Drill Bit

6 hole sizes | Easy-to-sharpen, non-skid tip | Single-fluted cutting edge | 3 flatted shank | Full lifetime warrantyAmazon.ca Product DescriptionThis IRWIN Unibit #2 High-Speed Steel Fractional Self-Starting Step Drill Bit features a single-flute cutting edge for greater control through each of its 6 steps. The sharp SpeedPoint tip penetrates fast and helps prevent walking, while the hex shank helps prevent slipping in a drill chuck. Use this reliable drill bit to drill holes into thin materials like stainless-steel, copper and more.From the ManufacturerThe #2 UniBit Step Drill has 6 holes--3/16-inch to 1/2-inch hole sizes with increments of 1/16-inch; shank size is 1/4-inch. Each UniBit step drill has an easy-to-sharpen, non-skid tip which eliminates skidding and the need for center punching; the tip gives sure starts even on curved surfaces. The single-fluted cutting edge that you will find on the UniBit step drills helps assure true round holes and allows greater control. They are constructed of industrial grade high speed molybdenum steel and heat treated to assure maximum durability. The UniBit step drill has 3 flatted shanks, which prevents slipping in drill chuck. The multiple steps on each UniBit eliminates the need to maintain a toolbox full of specific size drill bits. Full lifetime warranty--each UniBit step drill is warranted to be free from defects in material and workmanship for the life of the tool, except for damage caused by abuse, misuse, or alteration.