This Precision Razor saw set is great for delicate sawing of model and rail road tracks. Come with heavy duty Platic handle knife with 2 razor saw blades extremly sharp. Great for cutting blsa wood, plastic, resin and metal. Comes with numbers 234 and 235 the only difference is one blade is 3/4 deep the other one is 1" deep. Both 4 1/2 inches long.Please keep out of the reach of children.