With reversing mechanism for clockwise and anticlockwise rotation: Many of the 52 teeth engage at the same time for transferring maximum torque. Quick-release button for releasing sockets instantly. Grip of oil- and acid-resistant TPR (Thermoplastic Rubber) with practical hole for hanging. Optimum surface protection: Double nickel-plating and single matt-finished chrome-plating. Head can be locked in 6 positions through 90° at the push of a button.