Have you ever been drilling with a holesaw and just when the pilot bit breaks through the teeth on the holesaw grab and snap your pilot bit? Well here is a simple trick to help eliminate that. Place a 1/4" X 1 1/2" fender washer over the pilot bit for holesaws up to 1 1/2" (1 1/4" conduit size). When the pilot hole is drilled, the teeth on the holesaw grab the washer, spinning it instead of grabbing. For larger holesaws you can stack 1/4" X 1 1/4" fender washers until there are 2 washers protruding past the teeth on the holesaw.
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