The circular saw may be scary, but we show you how to use it safely. Plus, a look at the best circular saws available now.

Whether you're using an adaptor with a standard circular saw, a router, or a jigsaw, these guide rails help you create the perfect cut every time, whether it's a dead-on cut or a bevel edge.

A smaller version of a traditional circular saw, this has a 6-1/2-in. blade and typically comes in a blade-left orientation, although some use a blade-right setup.

The only thing I would change is the plywood thickness--for these, I used a 3/8-in. scrap I had on hand. Next time, I'll use 1/2-in. plywood to create a more rigid guide. When I'm not using them ...