The Precision Razor saw set is great for delicate sawing. Come with heavy duty Platic handle knife with 2 razor saw blades extremly sharp. Great for cutting balsa wood, plastic, resin and metal. Comes with numbers No. 234 Fine Saw Blade and No. 235 Medium Saw Blade the only difference is one blade is ¾ deep the other one is 1" deep. Both 4 ½" inches long.