uxcell Carpenter 1/4 Inch x 3/8 Inch Round Shank 2 Flutes Cove Box Router Bit Product Name : Cove Box Bit;Standard : 1/4" x 3/8";Radius : 4.76mm / 3/16" Cutting Diameter(Approx) : 9.52mm / 3/8";Shank Diameter : 6mm / 1/4" Cutting Thickness : 8mm / 5/16";Total Length : 40mm / 1.6" Material : Metal;Color : Silver Tone,Blue Total Weight : 21g;Package Content : 1 x Cove BoxBit1 x Hard Plastic Case