Professional Total Drive socket set. Manufactured from hardened & tempered heat treated Chrome Vanadium steel. Fully polished black chrome finish with machined & lacquered surfaces. Can be used on a wide range of fasteners. All are suitable for Spline, Metric Hex & Bi-Hex, with many also equivalent to TRX-Star*, Whitworth, Imperial Hex & Imperial Bi-Hex. Knurled ring for extra grip with greasy fingers. Features 72-tooth flip reverse ratchet wrench with push-button quick release. Supplied on composite socket retaining rail. Contents: Standard Sockets 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19mm, 3/8" Sq Drive 72-Tooth Ratchet Wrench