Bit holder screwdrivers are designed to hold interchangeable screwdriver bits giving the user freedom to select the correct bit type and size for different types of screw. Bit holder screwdrivers have a mechanical or magnetic mechanism at the tip of the shaft that holds the bit securely in place which can be removed and exchanged for another as required. Bit holder screwdrivers are very versatile and can accommodate a wide range of bit types and sizes including Phillips, slotted, Torx and Hex bits eliminating the need to carry around multiple individual screwdrivers with different bit types.