Gritted blade fits all reciprocating saws. Resistant to heat and abrasion, never needs resharpening. Cuts brick, cast iron pipe, ceramic tile, composites, fiberglass, flagstone/slate, hardwood, laminates, marble, plaster, plywood, PVC, reinforced cement. Set includes (1) medium grit, 3/4 in W No.1810, 6 in, 152 mm, No.01818, 9 in, 229 mm, No.1822, 12 in 305 mm.