ITEM NAME:1/2'' Shank Flush Trim Router Bit Top & Bottom Bearing Router Mortise Cutter Description: Shank diameter: 1/2 inch/12.7mm, Blade diameter: 3/4 inch/19.01mm, Blade length: 63.5mm/ 2.5inch Made from cemented car.1 Piece Flush Trim Cutter. Color: As Pictures Shown.