Timberline 5/16\” Mortising Chisel & Bit 5/16\” size 8-1/4\” overall length Product Description Specs Timberline 5/16\” Mortising Chisel & Bit. Includes both square chisel & special drill bit. Used in Drill Press Mortising Attachments. Product Title Size Body Diameter Overall Length Model # Timberline 5/16\” Mortising Chisel & Bit 5/16\” 5/8\” 8-1/4\” 609-110 For California Residents: WARNING: Cancer & Reproductive Harm – www.P65Warnings.ca.gov WARNING: Drilling, sawing, sanding or machining wood products can expose you to wood dust, a substance known to the State of California to cause cancer. Avoid inhaling wood dust or use a dust mask or other safeguards for personal protection. For more information go to www.P65Warnings.ca.gov/wood