for solder-free electrical connections, almost parallel crimping movement, consistently high crimping quality thanks to precision inserts and ratchet (can be unlocked), crimping pressure is precisely set (calibrated) at the factory, power amplification through leverage for less tiring work, ergonomically shaped handles, wide range of different crimping inserts for almost all current crimp connections , various positioning aids for precise positioning, with mounted crimping insert for non-insulated, open connectors (4.8 and 6.3 mm connector width), special quality chrome vanadium electric steel, oil-hardened