Professional heat treated Chrome Vanadium steel sockets. Fully polished black chrome finish with machined and lacquered surfaces. S2 Steel TRX-Star* bits with a phosphate finish. Knurled ring to assist gripping with oily fingers. Supplied on socket rail. Features & Benefits:Professional heat treated Chrome Vanadium steel sockets.Fully polished black chrome finish with machined and lacquered surfaces.S2 Steel TRX-Star* bits with a phosphate finish.Knurled ring to assist gripping with oily fingers.Contents: TRX-Star*; T10, T15, T20, T25, T27, T30, T40, T45, T47, T50.Supplied on socket rail.Lifetime guarantee*.Model No. AK6207B Specifications: Model No AK6207B Brand: Premier Black Contents: 3/8"Sq Drive 50mm TRX-Star* Socket Bits; T10, T15, T20, T25, T27, T30, T40, T45, T47, T50 Drive: 3/8"Sq Maximum Length: 50mm Minimum Length: 50mm Nett Weight: 0.00kg