Seven Piece Hex Bit Set - These bits are a must when dealing with a variety of automotive applications. All Bits are two piece construction and made from S-2 steel alloy. This Metric Hex bit set come packaged in a plastic rail and includes the following SAE sizes: 1/8in., 5/32in., 3/16in., 7/32in., 1/4in., 5/16in. and 3/8in. for use with 3/8in. square drive ratchet. Made in China. One year manufacturer's warranty.