40 pc 38 12 bit set chrome vanadium 40pce38in and 12in crv drive bit set manufactured from chrome vanadium crv steel for strength and durability torx hex and spline bits suitable for all purposes in 30mm and 75mm lengths hardened adaptor tips for strength and durability 38in and 12in socket adaptors to fit any 38in and 12in ratchet or screwdriver handle