Step Drill BitMulti-steps eliminates need for special sizes of bits. Double fluted design for speed and accuracy. Flats on shanks prevent slippage, size markings on bit for easier hole identification. Single concave flute design creates perfectly round holes in thin materials including steel, brass, copper, and aluminum. Graduated in 1/16 IN increments to drill 12 hole sizes from 3/16 IN to 7/8 IN. 3/8 IN shank. Carded. Available Only At Mesquite, Woodburn.View Black Decker Dwlts website for details and warranty information on this product.
From the Manufacturer
DeWalt DW1786 3/16-Inch to 7/8-Inch 3/8-Inch Shank Step Drill Bit