KleenGuard™ A35 Economy Liquid & Particle Protection Coveralls, Zipper Front Open Wrists Ankles, White, 2XL ORS NASCO Split bite jaw increases grip 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 is a positive locking mechanism that prevents loosening in hammer and other high vibration applications Anti lock nut prevents chuck from lock opening Precision operation that meet or exceed stringent din run out and dimensional specifications reach and precision Designed for use in the same power tools as bonded abrasive wheels general industrial manufacturing and maintenance Styles available for zipper front only zipper front elastic wrists ankles