When you have frozen or rusted screws to break loose, there's no substitute for an impact driver. Just load the appropriate slotted or Philips bit, place the driver on the screw, twist the driver, then strike it with a hammer. Simple and very effective! Precision-built and affordable, Perfect for handling Rotor retaining screws, Truck Bed bolts, and other stubborn fasteners. Powerbuilt products meet or exceed ANSI standards.