1[5 Piece Set] This router bit set includes 5 different sizes to meet various woodworking needs, with an 8mm shank diameter that is compatible with multiple machine models. 2[Carbide Material] The router bits are made from carbide, with high hardness, featuring anti kickback design, ensuring sharper cutting. 3[Heat Resistant Coating] The heat resistant PTFE coating prevents buildup of sawdust, resin, and pitch, ensuring smoother cutting operations. 4[Multi Purpose] Ideal for cutting through all types of composite materials, plywood, hardwood, MDF, and cork, providing precise corner rounding results. 5[High Frequency Welding] The router bits are securely welded using high frequency welding technology, ensuring durability and preventing blade breakage.