Press the switch button to take out the drive bits for your use. Ideal tool for the repairing and maintenance of household appliances. Equipped with a quick ratchet wrench, convenient to rotate the screw bits and reducing hand fatigue. Come with a carry bag, the snap ring behind it can be installed in the belt or pocket. It is convenient to carry with you. Constructed of chrome vanadium steel, the drive bits have high hardness, good wear resistance and long durability.