• One of a comprehensive range of Premier Hand Tools, suitable for daily professional use.• Professional heat treated Chrome Vanadium steel sockets.• Fully polished black chrome finish with machined and lacquered surfaces.• S2 Steel TRX-Star*, Hex & Spline bits with a phosphate finish.• Knurled ring to assist gripping of socket with oily fingers.• Contents: 3/8"Sq Drive Socket Bits; Spline - M4, M5, M6, M8, M10, M12, TRX-Star* - T10, T15, T20, T25, T27, T30, T40, T45, T47, T50, Hex - 4, 5, 6, 7, 8, 10.• Supplied in an EVA storage tray.• Lifetime guarantee*.Professional heat treated Chrome Vanadium steel sockets. Fully polished black chrome finish with machined and lacquered surfaces. S2 Steel TRX-Star*, Hex & Spline bits with a phosphate finish. Knurled ring to assist gripping of socket with oily fingers. Supplied in an EVA storage tray.• Professional heat treated Chrome Vanadium steel sockets. • Fully polished black chrome finish with machined and lacquered surfaces. • S2 Steel TRX-St