The DEWALT DT7522 Extreme Impact Bit Holder has an extended FlexTorq(r) Zone to transfer optimal torque in hard joint applications, providing durability and longer life. Fitted with a powerful magnet enabling tasks to be completed quickly and reduces instances of dropped or lost screws. It has a 1/4in Hex shank, making it suitable for use with all standard impact drivers, drill drivers and electric screwdrivers.