Sealey DC006 Drill Chuck Keyless Auto Lock 13mm 1/2"-20UNF Self-locking keyless chuck for cordless power tools, air tools and drill presses. Self-locking mechanism allows the user to apply ultimate torque to the drill bit when fully locked. Also features a quick release action. Self-locking keyless chuck for cordless power tools, air tools and drill presses Self-locking mechanism allows the user to apply ultimate torque to the drill bit when fully locked Also features a quick release action Model No DC006