1[5 Pcs Set] This router bit set includes 5 specifications: 8x16mm, 8x17mm, 8x19.05mm, 8x22mm, 8x24mm, providing various options for woodworking projects. 2[Carbide Tip] The carbide drill bits have undergone heat treatment, resulting in high hardness and toughness, ensuring long lasting performance. 3[Sharply Edges] The sharply cutting edges allows for precise and smoother cuts, while ensuring stable operation during woodworking tasks. 4[Hardened Steel Body] The router bit features a sturdy hardened steel body with anti kickback design, stackable design, and heat resistant PTFE coating, enhanced performance. 5[With Storage Box] This set of round nose bits comes with convenient storage boxes, providing organized and easy access to your woodworking tools.