ITEM NAME:2 Pieces Straight Router Bit 5/16inch Shank Diameter, 3/4inch Cutter Diameter, Description: Shank diameter: 8mm Straight router bit, wood milling cutter. Solid hardened steel cutters with anti-kickback design. Build-up & Heat Resistant PTEE Coating. Cemented car.8mm (5/16"). 19.05mm (3/4")". #1 Size (Cutting LengthxOverall Length): approx. 25x70mm/0.98x2.7". #2 Size (Cutting LengthxOverall Length): approx. 50.8x97mm/2x3.82".