EZARC Reciprocating Saw Blade 12-Inch 10/14TPI Multi-purpose R1225DG(5-Pack) Extremely long lifetime with HSS 8% Cobalt reinforced teeth Powerful cuts on multi-material, e.g. Metal, wood, fiberglass, nails, cable Progressor teeth design make this blade suitable for both thin and thick-walled materials M42 maxmized the cutting range from soft to hard Fast cutting speed due to the aggressive shank angle