The faithfull 37 piece screwdriver bit set is an excellent addition to any toolkit this clever set contains a mix of the most commonly used screwdriver bits for added versatility two 14in drive adaptors are also included that enable the use of screwdriver bits or sockets with a power tool bits are manufactured in chrome vanadium s2 steel and colour coded for easy identification and supplied complete with a strong metal storage case set contains the following bits 5 x 25mm pozi bits pz1 pz22 pz