Round off the sharp edges of a screw head and, just like that, you're stuck in DIY limbo—with a fastener that's neither in nor out. It's easy to do with today's powerful cordless drills.

An angle grinder is the best tool to use for trimming down exposed bolt ends. Here’s how to do it. To do this, you’ll need a bench vise and an angle grinder with a metal cut-off wheel.Use a ...