uxcell Woodworking Tool 1/4" x 1/2" Metallic Core Box Router Bit Product Name : Cove Box Router Bit;Shank Diameter : 6.35mm / 1/4'' Cuttting Diameter : 12.7mm / 1/2'';Total Length : 40mm /1.57'' Material : Metal;Color : Silver Tone, Green Net Weight : 26g Package Content : 1 x Cove Box Router Bit