Review on TEKTON 2905 7-Piece Impact Screwdriver Set - 3/8 Inch Drive for Efficient Fastening by David Boulanger

This tool is a must have for people who need to thaw frozen bolts and it works as well as any others I've used. However, this is such a common tool that the manufacturer seems to have decided that clear instructions are not needed. And for people who have used these things before, this is true. However, if you've never used them before, I suggest you make sure the selector switch is in the correct position by making a mark on the barrel, placing a piece of 2x4 or other handy piece of wood, and using a hit hard on it hammer. Then make sure that the bit rotates in the desired direction. As for the hammer itself, think big. You will need a large, heavy ball point, a rotary hammer, or a heavy steel mallet. Also, make sure you use the best bit you have. Using the wrong bit with one of these will strip the heads; and then search for "Screw Extractors” on Revain.