Industrial Grade Core Box Router Bits. 7pcs 1/2 Shank Grooved Core Box Router Bit Set: 1pcs 25.4mm Drill Bit, 1pcs 28.6mm Drill Bit, 1pcs 31.75mm Drill Bit, 1pcs 34.9mm Drill Bit, 1pcs 38.1mm Drill Bit, 1pcs 41.3mm Drill Bit, 1pcs 50.8mm Drill Bit. Sturdy hardened steel body with anti-rebound design. Build-up and heat-resistant Teflon coating. Carbide tip for increased speed and life, durable, hardened and sharpened. High quality carbide, sharp and smooth cutting, reducing the possibility of burrs; increased speed and life, hardened and sharpened. This round nose groove core box router bit is suitable for solid wood, laminate, MDF, plywood, etc. Create very smooth cuts. Designed for woodworking enthusiasts or carpenters. High hardness alloy material, fast cutting speed, strong and durable; round nose router is used for cutting, beading, grooving and general decoration. Router bits are used with CNC and other automatic routers, handheld and benchtop portable routers. Colour:Blue Material:Cemented Carbide Package Contents: 7 * Woodworking half circle relief drill bit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.