Expert Quality, 7 Ribe® ; socket bits, 100mm long. All sockets manufactured from hardened and tempered chrome vanadium steel with sand blasted bits of S2 silicon steel. Each socket has a knurled ring for extra grip. Supplied on a steel socket retaining rail. Display packed. Contents: 7 x Ribe® ; socket bits: M4, M5, M6, M7, M8, M9, M10