Tajima Tool's Combination Drywall Rasp ($16) has teeth made of chromed die-cast aluminum. According to the manufacturer, the aluminum teeth will last four to five times longer than the teeth on competitive steel rasps. The 7-inch tool feels very light in hand and has a nice rubberized grip surface. The rasp has a recessed section with coarse teeth for quickly shaping or straightening the edge of a drywall sheet, as well as a finer flat section and aggressive corner teeth. Bi-directional teeth cut forward and back. 888-482-5462, www.tajimatool.com.