Unique arc shape frame allows for cutting in tight, hard-to-reach areas Deep throat allows efficient cutting of large PVC pipes Heavy duty cast aluminum I-beam frame for strength and durability Blade angles on both 90 and 45 axis for measured cutting High tension knob allows for easy blade tension adjustment Ergonomically designed handle for comfortable use 4 depth of throat 12 blade length Replacement blades 15-922A (2524-6562), 15-924A (2524-6239) and 15-928A (2524-6521)