ITEM NAME:2Pcs 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"). Size (Cutting LengthxOverall Length): approx. 25x70mm/0.98x2.7" and 38.1x83mm/1.5x3.27".