uxcell 1/2" x 1 1/4" Double Flute Core Box Router Bit Tool Product Name: Core Box Router Bit; Material: Metal Standard: 1/2" x 1 1/4"; Shank Diameter: 12mm / 1/2" Cutting Diameter: 31.7mm / 1 1/4"; Cutting Edge Length: 22mm / 7/8" Overall Length: 54mm / 2 1/8"; Weight: 96g Package Content: 1 x Core Box Router Bit