uxcell 2 Pcs Round Shank Dual Flutes 1/4" x 5/16" Cove Box Bit for Carpenter Product Name : Cove Box Bit;Standard : 1/4" x 5/16";Shank Diameter : 6.35mm / 1/4" Cutting Diameter : 7.96mm /5/16";Cutting Radius : 3.96mm / 5/32" Cutting Depth : 7.2mm / 9/32";Overall Length : 46mm / 1.8" Color : Silver Tone, Blue;Material : Steel, Carbide Weight : 46g;Package Content : 2 x Cove Box Bit2 x Plastic Case