Manufactured from hardened and tempered Chrome Molybdenum steel with a manganese phosphate finish for resistance to corrosion. 3/8""Sq drive TRX-Star* impact socket bits with an additional locking 1/2""Sq drive quick change adaptor. Supplied in an EVA storage tray. One of a comprehensive range of Premier Hand Tools, suitable for daily professional use. Manufactured from hardened and tempered Chrome Molybdenum steel with a manganese phosphate finish for resistance to corrosion. 3/8""Sq Drive impact TRX-Star* socket bits with an additional locking 1/2""Sq drive quick change adaptor. Contents: 3/8""Sq Drive TRX-Star* Socket Bits; T30, T40, T45, T50, T55, T60, T70, 1/2""Sq Drive Quick Change Adaptor. Supplied in an EVA storage tray. Lifetime guarantee*.