The Aven Tools 10189 Crimping Tool for Miniature Insulated Terminals (26-22, 24-18, 22-16 AWG) features a built-in ratchet that applies the pressure necessary to ensure a complete crimp every time. The crimper is equipped with a safety release function that allows you to stop a faulty crimp before the crimping cycle is complete. The precisely milled, hardened steel dies have individual crimping slots for each wire size from 26-22/24-18/22-16 AWG; sizes are color coded on the die for easy identification. The dies can easily be changed by sliding them out of the frame - no tools are required. The durable rubberized grips make the crimping tool comfortable and easy to use.