Got a broken hammer handle? Don't toss it, fix it. A replacement handle will cost about one-third of the price of a new hammer, and the replacement process is simple. Use a handsaw to cut off what remains of the broken handle. Lay the head on a small block of wood with the claws facing up, and use an electric drill to remove the remains from the eye. Next, insert the throat of the new handle into the head. The fit should be snug. If it's too tight, try shaving it with a razor knife or belt sander. With the handle in place, cut off the portion that projects beyond the top of the head. Drive a wood shim into the groove at the top of the handle. Finish the job by inserting a metal wedge at a right angle to the wood shim. And that's the On The House tip for today.