[Router Bit Size] Countersink router bits with radius sizes: 1/8" (3.17mm), 3/16" (4.76mm), 1/4" (6, 35mm), 5/16" (7.93mm) and 6mm stem [Premium Material] Solid 45 hardened steel rods and C3 micro-grain tungsten carbide burrs, high-tech special grinding process and advanced spray coating technology with anti-kickback design [Application] Roundover Edging router bits are used for edging, these bits can also be used to create miter joints of different angles. Ideal for combined plunge cutting and pattern/pattern routing [Range of use] Top bearing rounding edge forming cutter set is used for wood, MDF, laminate, particle board, plywood compact board, acrylic, etc. . [What You Get] 6mm Round Shank Multi-Purpose Burr Set of 4 Product Description 6mm Shank Rounded Over Bit, 4PCS Rounded Corner Edge-forming Bit Set Woodworking Milling Cutter Tools for Cutting, Threading, Chamfering Description: ✔ Industrial grade micro-grain carbide tips; Baked-on heat-resistant coating prevents buildup of sawdust, resin and pitch ✔Top bearing rounding edge forming bit creates smooth rounded edges on boards and panels ✔Roudover Edge Router Bits are ideal for combination plunge cutting and pattern/pattern routing ✔Chamfer bits can be used without the bearing like a standard straight bit ✔Carbide router bits have 2 regular blades which can be especially handy in a router table on CNC, table-mounted and handheld routers Specification: Item Type: Corner Rounding Router Bit Body Material: 45 Carbon Steel Stem Diameter: 6mm Blade Material: YG8 Alloy Carbide Radius: 1/8"(3.17mm),3/16"(4.76mm),1/4"(6.35mm),5/16"(7.93mm) Package includes: 4pcs x Round Router Bit Note： Always wear goggles and use hearing protection equipment when working Always use the safety cover provided by the benchtop router table