PacTool International SS424 Backerboard Shear STRAIGHT & CLEAN CUTS - Snapper Shear cuts up to 1/2 thick Hardiebacker fiber cement under layment DUST-FREE- Unique backerboard shear design allows for both indoor and outdoor operation. Use indoors without covering the house in dust, easy clean up! FASTER & EASIER- when the Snapper Shear is used to cut fiber cement, compared to using score-and-snap, with less broken corners POWERFUL MOTOR- Backerboard Snapper Shear boasts a contractor grade 6.5-amp motor LOWER JOB SITE COST- increased efficiency and reversible blades machined from solid tool steel need less replacements , durable enough for 20,000 running feet when used appropriately