Weidmuller 9012500000 crimping tool for wire end ferrules with/without plastic collars, 0.5 to 4mm² range. The PZ 4 crimping forms a secure connection between conductor and contact and has largely replaced soldering. Crimping denotes the creation of a homogeneous, permanent connection between conductor and connecting element. The connection can be made only with high-quality precision tools. The result is a secure and reliable connection both in mechanical and electrical terms.