Long-lasting. Cuts abrasive, hard and difficult materials. Tungsten carbide grit on the edge of the blade allows side cutting as well as forward. Extremely resistant to heat and abrasion. No teeth to dull or chip. Smooth cutting, even in thin materials. Saws through brick, cast metal, PVC (polyvinyl chloride), ceramic tile, composites, hardwood, plaster, plywood, fiberglass, and cement backerboard. Cuts on both up and down stroke. Universal fittings, compatible with all popular makes of power tools. 1 blade per card.