Jacobs® 31038 Keyless Drill Chuck, 1/2" BackToCampus 3/4" bore x 4" diameter

3/4" bore x 4" diameter

Feed-thru lugs are included as standard to subfeed to a seperate powermark gold load center

Tough case container bit retention system keeps bits secure

Granite-Ware® 7

Jacobs® 31038 Keyless Drill Chuck, 1/2" BackToCampus 3/4" bore x 4" diameterSplit bite jaw: increases grip over standard bite chucks by providing more contact with the bit. Superior gripping force: provides high mechanical advantage to convert hand tightening torque into superior bit gripping force. Hammerlock mechanism: positive locking mechanism prevents loosening in hammer and other high vibration applications. Hammerlock mechanism: positive locking mechanism prevents loosening in hammer and other high vibration