Features and Benefits: Auto-locking feature allows for safe removal of tap adapter; Works with either round or hex style dies; Extend the length of the tap and die system by combining adapters and any standard 3/8" drive extension; Supported by a full line of replacement taps and dies packaged in plastic cases inside a poly bag; Die adapter works with GearWrench Pass-Thru Ratchet and Socket System; Additional tap and die open stock now fully supported and lifetime warranty.