Self-adjusting terminal crimping pliers, suitable for crimping wire ferrules with sizes from 0.25 to 6 mm². The pliers leave a hexagonal profile on the wire ends during the crimping process. The pressure acts uniformly on the ferrule from 6 sides, creating a high-quality crimp and ensuring that the ferrules are securely placed on the wire ends. Equipped with a locking mechanism to prevent accidental closing or opening and features ergonomically designed handles, making the work easier.