HWFK44P6 Pro 6 inch Hot Knife and Freehand Router KitBy Hot Wire Foam FactoryIncludes Pro Knife with 6in blades, Freehand Router with 5 blades, adjustable temperature Pro Power Station, 85 minute Hot Wire Foam Factory Instructional DVD, and sturdy carrying case. This kit is popular with artists doing large projects requiring fast cutting versatile foam cutting and sculpting tools.The 6in Hot Knife is a combo hand held scroll saw and power drill that cuts foam with fast, clean surgical precision. The 6in cutting blade is tougher, and cuts 1.5x faster than the regular 4in Hot Knife. The 8in or 6in Pro Knife along with the Freehand Router are the tools of choice for large sculptures and theater props. These tools can only be used with Pro Power Station.