【Professional Crimping Tool】Each ferrule tool set includes a four-sided wire crimping tool and 1250 insulated terminals. For both insulated and non-insulated ferrule terminals, these power tools can be used with ferrules ranging from AWG 23 to AWG 7 (0.25-10mm2).【Ratchet Design】【Self-Adjusting】The terminals of the ferrule crimping tool are crimped by squeezing the handle for a full ratcheting cycle. The self-adjusting design of the ratchet improves crimping accuracy and reliability, and automatically adjusts to the appropriate diameter for stripping terminals to avoid wasting terminals. 【Ergonomic Handle Design】The handle of the crimping pliers wire end ferrules crimper is made of PP and TPR, non-slip and extremely comfortable to hold and grip thanks to the leverage set. More effort when operating, releasing the trigger in the handle helps you quickly open the jaws. The terminals are marked on the box, very suitable for storage and transport, you will find 1250 wire end ferrules in