TASK Reciprocating Blade, Carbide Cutting Edge, 4 in Length, 0.031 in Thickness, Applicable Materials: Brick, Carbon Fiber, Cast Iron, Cement Board, Ceramics, Composites, Concrete, Drywall, Fiber Cement, Fiberglass, HardiPlank, Kevlar, Marble, Plastics, Rein Plastic, Steel