This is a set of 20 SK SAE 3/8 Drive Socket Ratchet Universal Extensions with some metric sockets. The set includes various sizes such as 18mm, 16mm, 3/8in. The sockets are of standard type with a 6-point drive type and a 3/8in. The brand is SK and the set includes both SAE and metric measurements. Also has extensions, a universal swivel socket, short and deep sockets, a breaker bar and ratchet. The tools are chrome finished and manufactured in the United States.