Reduced shank diameter for greater access, ideal in tight areas. 1/4"D socket bits: 5, 5.5, 6, 7, 8mm. Length: 87mm. 3/8"D socket bits: 10, 11, 12, 13, 14mm. Length: 93mm. Sockets manufactured from robust chrome vanadium steel, with polished chrome finish; bits from impact-grade S2 steel. Supplied on a magnetic socket rail.