Self-adjusting crimping pliers for wire end sleeves, designed for crimping wire end sleeves according to DIN 46228 parts 1 and 4. The self-adjusting feature adapts to the desired size of the wire end sleeve and prevents incorrect crimps that could result from using the wrong tool. The wire end sleeves are inserted into the pliers from the front. The integrated locking mechanism ensures repeatable, high crimp quality with a self-releasing mechanism. The lever allows for optimal power transfer for fatigue-free operation. The compact design and lightweight construction provide high user comfort. The capacity ranges from 0.08 to 10/16 mm².