Phoenix Contact 1031721 Crimpers come in contact connection types with insulated and uninsulated ferrules adhering to standards like DIN 46228-1 and UL 486F for specifications of various forms. The pliers support cross sections ranging from 0.14 mm2 to a maximum of 10 mm2, suitable for twin connectors up to 2 x 4 mm2, featuring an automatic adjustment mechanism with rotating dies and methods for inserting ferrules both laterally and frontally.