Ideal for use in model construction, shaping balsa wood and cutting fiberglass, plastic, metals and model railroad tracks, the Razor Saw Set includes a #5 contoured plastic handle and a 4-1/4" knife handle with one each razor saw blades #234 and #235. Blade #234 is 4-1/2" long, 3/4" deep with forty-two teeth per inch. The blade #235 is 4-1/2" long, 1" deep with forty-two teeth per inch and is used for delicate sawing. Carbon steel blades Blades resist corrosion and won't rust Works best with soft woods, plastic, rubber or foam