Now you can cut fiber cement up to 5/8" thick, fast and easy. The P-595 90 PSI, 2200 RPM, variable speed, pistol grip pneumatic model comes with a rugged steel shear head to provide fast cutting of up to 5/8" fiber-cement siding, panel, and backer board. Clean cut, with virtually no airborne dust. The A-2 tool steel blades last longer and cut cleaner.