This is the New HSS Steel Large Step Cone Drill Titanium Bit Set Hole Cutter, which is made from HSS steel, and with the Titanium coated to reduce friction and heat. It is very suitable for using to cut holes in a variety of materials including steel, brass, wood, plastic, etc. Features - Color: As the picture shown. - Material: with Cobalt Coated. - This set replaces 50 individual drill sets. - Made by . - Self starting - no need for a hole. - Cobalt coated to reduce friction and run cooler. - Automatically deburrs holes as you drill. - Includes protective padded aluminum case. Specifications - 1/4’’ to 1 3/8’’ Drill Bit: 10 Steps (1/4’’, 3/8”, 1/2’’, 5/8’’, 3/4’’, 7/8’’, 1’’, 1 1/8’’, 1 1/4’’, 1 3/8’’). - 3/16’’ to 7/8’’ Drill Bit: 12 Steps (3/16’’, 1/4’’, 5/16’’, 3/8’’, 7/16’’, 1/2’’, 9/16’’, 5/8’’, 11/16’’, 3/4’’, 13/16’’, 7/8’’). - 1/4’’ to 3/4’’ Drill Bit: 9 Steps (1/4’’, 5/16’’, 3/8’’, 7/16’’, 1/2’’, 9/16’’, 5/8’’, 11/16’’, 3/4’’). - 1/8’’ to 1/2’’ Drill Bit: 13 Steps (1/8’’, 5/32’’, 3/16’’, 7/32’’, 1/4’’, 9/32’’, 5/16’’, 11/32’’, 3/8’’, 13/32’’, 7/16’’, 15/32’’, 1/2’’). - 3/16’’ to 1/2’’ Drill Bit: 6 Steps (3/16’’, 1/4’’, 5/16’’, 3/8’’, 7/16’’, 1/2’’). Package list: 10 x Drill Bits 2 x Aluminum Case