Excel carving routers are made from durable carbon steel. These small handy tools are used for fine detailing in many applications including woodworking, printmaking, stamp making, ceramics, and model making. These replacement routers come in a pack of two and are for use with the Excel K7, K2 Aluminium Knife, K5 Heavy Duty Plastic Knife, and K6 Knife with a 3/4in Heavy Duty Aluminium Hexagon Handle (each sold separately).