Razor-sharp, stainless steel Microplanes® are for rapid smoothing and shaping of the foam. The handle has been designed with an open back that allows the shavings to fall out instead of packing up behind the razor sharp teeth. This allows for gentle sculpting with out jagged jumps. This tool is very easy to use and has several blade options. The flat, course blade is the most common and is supplied with a handle. The other blades are easy to change but additional handles are available. Changing the blades is easy, just firmly snap the blade out and then back in.