General description This set includes two styles of Ribe profile bits, both M10 - one for standard fittings and one for VAG head bolts. The sizes are designed for versatility, allowing use on aftermarket cylinder head bolts as well. Technical specifications 2 x M10 Ribe profile sockets Size: M10 x 1/2""D x 140mm long Socket material: chrome vanadium Bit material: S2 steel