21-pack Skil drill bit set is ideal for stocking your toolbox. Includes two each of 116-in 564-in 332-in 764-in and 18-in bits. Includes one each of 964-in 532-in 1164-in 316-in 1364-in 732-in 1564-in 14-in 516-in 38-in and 12-in bits. Gold-oxide coating resists heat build-up and lengthens bit life. Bits of 18-in and above have a 135 split point that starts on contact to minimize bit walking. Storage case labeled for easy access and organization.