It’s important to have the right tool for the job, screwdriver bit sets offer a variety of bits for various screw types. Having a set of screwdriver bits offers an all purpose approach by having all the necessary bits in place if you need to change screw type. The Screwdriver bit sets usually include Hexagon, Phillips, Pozidriv, Slotted, Torx and a few others.These screwdriver bits can work with manually with screwdrivers or be attached to a bit holder for use with a drill. Usually made from tough steel to be durable and reliable:Impact bits are designed for use with impact driversBi Torsion bits are tempered to reduce the hardness of the shaft for greater durability