Draper Ball-end Hex. Socket Bit Set, 3,8" Sq. Dr., 48mm (7 Piece). Expert Quality, 7 sockets fitted with ball end hexagonal bits. All sockets are manufactured from hardened and tempered chrome vanadium steel with sandblasted bits of S2 silicon steel. Each socket has a knurled ring for extra grip. Supplied on a steel socket retaining rail.