Overall Diameter: 31/64"Overall Length: 2-5/8"Cutting Edge Length: 1"Shank: 1/2"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 1/2" PlywoodProduces a Tight Fit When Mortising Standard PlywoodMicrograin Carbide Tips Provide Superior Wear Resistance And Long Life