Have a stripped screw? Try this trick. Place a wide rubber band between the screw driver {we recommend bumping up one size from the screw driver bit which caused the strip) and the screw. Then apply hard, but slow, force as you turn. If you're fortunate, the rubber band will fill in the gaps caused by the strip and provide enough grip to remove, or at least loosen, the screw. Because of the force and slow speed required to successfully accomplish this task, don't use a battery operated screwdriver.