JGZUI Double Bearing Roundover Router Bit Set Create smooth, professional edge profiles on cabinets, furniture, shelves, and decorative trim with this double-bearing roundover set. Dual guide bearings keep the cut aligned along the workpiece edge, reducing chatter and improving finish quality. Each bit features a C3 tungsten carbide cutter brazed to a hardened No. 45 carbon steel body. The heat-resistant coating helps prevent resin and pitch buildup, extending cutting life across hardwoods, softwoods, MDF, plywood, and laminate. The standard 1/4" shank fits routers, trim routers, and most router tables. Available in four popular radius sizes and a complete 4-piece set with storage case. Shank: 1/4" Available Radius Sizes: 1/4", 5/16", 3/8", 1/2" Blade material: C3 tungsten carbide Body material: No. 45 carbon steel Coating: Heat-resistant spray coating Bearing: Dual guide bearings Application: Hardwood, softwood, MDF, plywood, laminate