The Crescent Nut Drivers feature a versatile design that quickly adjusts from standard handle to T-handle to provide additional leverage for greater torque. The hollow shaft works over long threaded rod where normal ratchets and sockets will not fit. The truly universal sizes fit both metric and SAE sized fasteners using just one drive head. The universal design fits 6 fastener types; hex, square, 12-point, E-TORX, partially rounded hex and spline. They are color coded for easy identification with corrosion resistant, polished chrome shafts. The dual material cushion grips are oil and grease resistant, whilst providing a comfortable, non-slip grip. 1 of each size supplied: 4.5mm (3/16in), 6mm (1/4in), 8mm (5/16in), 9mm (11/32in), 10mm (3/8in), 11mm (7/16in), 13mm (1/2in).