Professional heat treated Chrome Vanadium steel sockets. Fully polished black chrome finish with machined and lacquered surfaces. S2 Steel stubby hex bits with a phosphate finish. Ideal for limited access applications. Knurled ring for extra grip with greasy fingers. Supplied on socket rail.10pc 1/4 3/8 & 1/2Sq Drive Stubby Hex Socket Bit Set - Black Series• Professional heat treated Chrome Vanadium steel sockets.• Fully polished black chrome finish with machined and lacquered surfaces.• S2 Steel stubby hex bits with a phosphate finish.• Ideal for limited access applications. • Knurled ring for extra grip with greasy fingers.• Contents: 4 5 6 7 8 10 12 14 17 19mm.• Supplied on socket rail.• Lifetime guarantee*.• Model No. AK6229BModel No: AK6229B:Brand: Premier:Contents: 1/4Sq Drive; 4PTDSEAAK6229B