Woodtek 122101, Bits, Drill And Boring, Plug & Tenon, 3/4" Tenon Cutter Cut uniform round tenons and dowels up to three inches long. Specifications: Cut Diameter=3/4 in, Cut Length=3 in, Material=HIGH CARBON STEEL Specifications: Overall Length=5-1/2 in, Shank Diameter=1/2 in