• Ti-coated, #4241 HSS, • For steel, cast iron, malleable iron, non-ferrous metal and plastic, • Sizing 1/16, 1/16, 5/64, 5/64, 3/32, 3/32, 7/64, 1/8, 9/64, 5/32, 3/16, 7/32, 1/4, 5/16, 3/8 in. What's Included: 1/16, 1/16, 5/64, 5/64, 3/32, 3/32, 7/64, 1/8, 9/64, 5/32, 3/16, 7/32, 1/4, 5/16, 3/8 in. drill bits and plastic caseTi-coated, #4241 HSSFor steel, cast iron, malleable iron, non-ferrous metal and plastic15 of the most-used sizes 1/16 to 3/8 in.120° split point for accurate, fast starts in material