A set of short metric Hex socket bits from 3mm to 17mm in two drive sizes. 3/8""D socket bits x 45mm long: 3, 4, 5, 5.5, 6, 8, 10mm. 1/2""D socket bits x 55mm long: 12, 14, 17mm. Sockets manufactured from satin finish chrome vanadium, bits from impact grade S2 steel.