Century Drill and Tool 10830 Nitro Carbide Tooth Reciprocating Saw Blades, 6TS by 3-1/2-Inch Scroll cuts non-metallic materials non-ferrous metals and composite construction materials Nitros fused carbide teeth offer superior cutting performance and longevity in non-metallic materials Designed to cut plaster plastic formica slate tile marble soft woods hard woods and all composite construction materials When tested in reinforced plaster over lath Nitro reciprocating blades lasted 10 times longer than other blades Made in the USA