Hand-held, center-drive concrete cutoff saws are a common item in many contractors' toolboxes — and for good reason. They're a versatile, quick and relatively inexpensive way to cut through concrete.

Everyone knows the circular saw is a job site favorite for chopping up plywood and lopping off two-by-fours, but this small, portable tool is good for a lot more than just that. For DIYers, makers, ...