【Exclusive special jaws】Based on customer feedback, the jaw shape and form have been improved from the semi-arc shape commonly used in the market to a unique square shape. This reduces the error due to deviation. The clamping jaws can now fit the terminal better. The crimping effect is stronger and smoother. Ensures good contact. 【Interchangeable crimping heads】This set provides 2 detachable crimping heads for different applications. They are not only suitable for crimping insulated cable lugs, but also for soldering wire connectors. You are free to replace them as needed. More versatile and practical. 【crimping area】Compatible with insulated terminals (0.5-1.0) / (1.5-2.5) / (4-6) mm² = AWG 20-10; weld tube (1-1.5) / 2.5 / (4-6) mm². 【Solid construction】Made of hardened steel alloy which is hard and reduces surface roughness. Maximizes the benefits of positive locking and automation of the crimping tool's unique mechanisms. Greatly improves crimping accuracy and saves labor. 【Fast