Most people buy a jigsaw to cut curves. But it can do much more. With its narrow blade, a jigsaw is the tool of choice for enclosed cuts--like making the sink hole in a new countertop or preparing woodwork for an outlet or switch. It's also perfect for cutting notches and shaping a counter to fit against an irregular wall. And, with the right blade, it not only handles wood, but also zips through plastic, laminates and many metals. All of this versatility makes the jigsaw a must-have tool for pros and serious do-it-yourselfers. Over the past few years, competition among the major brands has been keen. And, with more models offering features such as orbital action and toolfree blade changing, the saws look more similar than ever. Yet, a multifaceted, three-day test of nine models revealed clear differences in performance. Here's what we found.