Tough and long-lasting tungsten carbide - never needs resharpening. Fits all popular makes of power tools. Replaces conventional specialist blades. Resistant to heat and abrasion. Cuts on both up and down stroke. Saws through brick, cast metal, ceramic tile, composites, cement board, concrete block, fiberglass, flagstone/slate, hardwood, laminates, marble, plaster, plywood, PVC, and reinforced cement. 3/4" width. Medium grit.