These tools are ideal for carving, shaving, shaping & forming. They have all the advantages of earlier sheet metal files plus one distinctive advantage, these really work. Constructed from tough, fully hardened stainless steel, MicroPlane tools feature razor sharp teeth that cut 10 times faster & hold a cutting edge 10 time longer than similar sheet metal tools. MicroPlane tools are designed to cut hardwood, softwood, masonite, particle board & other relatively soft materials. The round blade comes equipped with its own comfortable Santaprene handle. It is used like other round files & rasps to cut flat bottomed notches & triangular grooves, but it cuts much faster & leaves a smoother finish than any similar tool.