The ratchet handle is an accessory installed on the sockets to turn bolts, nuts and others objects that are difficult to turn by hand. The internal structure is driven by the gear torsion, so it is called the ratchet handle. Because of the gear, it is more convenient to use than others handles. The nut can be quickly removed by swinging left and right, saving more time of pulling up and unplugging the tool to change the direction of force. According to the classification of gears, it can be divided into 24T, 36T, 48T, 72T, 92T, 108T ratchet handles. The value larger, the amplitude of swinging left and right during use is smaller, which is beneficial for use in small spaces.