Material: solid hardened steel cutter body, durable. High abrasion resistance, high precision and high toughness. Coating of cutter body can better discharge chips and reduce friction. It is not easy to deform and rust, has good oxidation resistance and strong tear resistance. Ideal for professional woodworking. Use: Suitable for MDF, solid wood, MDF, particle board, plywood, wooden door frames, wooden window frames, cabinets and boxes, etc. Ideal for edging, trimming, veining and grooving in all woodworking projects for both professionals and hobbyists. Widely Used:- The hard metal cutting edge of the router bit ensures a long life. Suitable for wood panels, medium density fibreboard, particle board, compact plywood panels, etc. Please avoid cutting ferrous metals and other hard materials, steel, iron, etc. Easy to store:-The cutter is equipped with a lightweight plastic storage box, which can store the cutting head when not in use to avoid cuts. Please take good protective measures during operation to prevent wood chips from damaging your eyes. Manually measure the size, there may be 0-5mm error, which is normal. Package contents: 7 x straight cutters. Mainly used for wood cutting, lining, graining and grooving.