Jacobs Hand-Tite Drill Chuck, 3/8 in Chuck, #24 Thread, 1.67 in Diameter, 2 in Length, Keyed/Keyless Chucks: Keyless, Suitable for: 3/8 in and 1/2 in Variable Speed Corded and Cordless Portable Drills

• Split 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
• Anti-lock nut prevents chuck from locking open
• Precision operation meet or exceed stringent DIN run out and dimensional specifications
• Ergonomic design material and surface finish combinations result in increased comfort and performance
• Rugged constructed of high performance material to maximize durability and performance