The B-52 manhole cutter from Mr. Manhole has a 52-inch fixed cutting diameter with optional 40- and 60-inch-diameter cutters. Carbide cutting teeth, which can be replaced in seconds, bite through asphalt and concrete road surfaces, removing manhole frames and surrounding road surfaces in minutes. The tool is designed for small municipalities or contractors who perform fewer than 50 manhole frame adjustments a year. 419/741-9075; www.mrmanhole.com.