14 piece screwdriver set including flat as well as ph and pz types features include tt mv plus steel blades and ergonomically designed bi material handles with hanging hole and t drive facility for added torque and comfort supplied in the unique teng tools double tc tray with removable lid and dovetail joints for use on itrsquos own or as part of the teng tools tc control system all teng tools screwdrivers are designed to have a hole in the handle which can also be used for securing the too