US PRO Tools 13pc Metric Hex Bit Socket Set includes 7 pieces with 1/4" drive (37mm length) in sizes 2, 2.5, 3, 4, 5, 5.5, and 6mm. It also includes 5 pieces with 3/8" drive (48mm length) in sizes 7, 8, 9, 10, and 12mm. Additionally, there is 1 piece with 1/2" drive (55mm length) in size 14mm. The model number is 2097.