Smooth-Cut Blades. Thanks to teeth that face in two directions, Dual Cut jigsaw blades can perform burr-free cuts on both sides of a workpiece, says the maker. The company also claims that a three-layer fabrication process gives the blades greater resistance to breakage and a longer lifespan than other, comparable blades. Twelve-packs of the 3-inch-by-5/16-inch jigsaw blades and 2-inch-by-3/16-inch scroll-cutting blades are available online for about $20. L.S. Starrett Co., 978/249-3551. starrett.com