Schwaben Impact Screwdriver

The impact driver is a fast and effective way to remove tight or corroded screws and bolts, reducing the chance of rounding off--or rounding out--the fastener head. Insert a slotted or Phillips head screwdriver bit into the driver. Place the screwdriver bit into screw head, and strike the driver with a hammer. The impact drives the bit inward as it rotates the screw, breaking it loose. Reverse the tool to tighten fasteners.
For stubborn bolts, remove the black screwdriver bit adapter head, and replace it with any 3/8 - inch drive socket.