narrow handle width and improved ergonomics for crimping end sleeves (ferrules) according to DIN 46228 parts 1 + 4 self-adjustment to the size of end sleeves (ferrules) required fits all twin- ferrules within the application range repetitive, high crimping quality due to integral lock (self-releasing mechanism) tools have been set precisely (calibrated) in the factory optimum transmission of force thanks to toggle lever for fatigue-reduced operation handy shape and low weight provide high operation comfort Chrome vanadium electric steel in special quality, oil-hardened