DRILL SET STEPPED 2 piece

Drill multiple size holes with one bit. Drill sheet metal and aluminum without deforming or distorting. Bits start on contact, deburr and chamfer while drilling and do not require a center punch. Titanium nitride coated high speed steel. 1/4in shank. Drill sizes 1/4in, 25/64in, 35/64in, 11/16in, 13/16in, 7/8in, 1in, 1-1/8in, 1-7/32in, 1-1/4in, 1-3/8in on one and the other has 3/16in, 1/4in, 5/16in, 3/8in, 7/16in, 1/2in, 9/16in, 5/8in, 11/16in, 3/4in, 13/16in, 7/8in.