21 PC set, with metal rail. SAE includes Craftsman 5/32 3/16 732 1/4 9/32 5/16 11/32 3/8 7/16 1/2. 3/16 & 7/32 are 12 pt, rest are 6pt. 5/16 & 3/8 are only ones that have minor wear, rest are unused. Metric includes 4 5.5 6 7 8 9 10 11 12 13. One Matco 5.5 mm minimum use, rest are all new Craftsman, all are 6 pt. Rail has plastic handle marked 1/4. All sockets have a lifetime guarantee, being craftsman and (1) Matco.