Overall Diameter: 15/64"Overall Length: 2"Cutting Edge Length: 3/4"Shank: 1/4"Plywood Mortising Bits Are Nominally Sized To Match The Actual Thickness Of The Plywood To Produce A Tight-Fitting JointCreates Cutting Diameter To Match Thickness Of 1/4" PlywoodProduces a Tight Fit When Mortising Standard PlywoodMicrograin Carbide Tips Provide Superior Wear Resistance And Long Life