Malco TSF2 TurboShear Fiber Cement Backer Board Shear Attaches to a drill or impact driver you already own Easily cuts 1/2-inch backer board and 5/16-inch Fiber Cement Siding Plank with minimal dust 360 degree rotating head for optimum tool clearance and material flow Able to cut precise arcs, straight lines and fine trimming Made in the USA