Materials: Crimper features heat-treated 45# steel body and 40Cr steel crimping head for ensuring high strength and good toughness, suitable for long time repeated use Hydraulic Design: Hydraulic mechanism for providing 6-ton maximum crimping power to crimp wires easily and rotary on/off knob for quick release, when the pressure reaches the maximum valve, it will release automatically to reduce over pressure Compatibility: 6 Ton hydraulic wire crimper features 9 sets of dies for providing large crimping range from 4 to 70 square millimeters, ideal for meeting your different crimping needs Tip: Yellow and black packaging are randomly sent, easy to carry, with a C-shaped head for easy die replacement and wire fixation Wide Application: The crimper tool is great for welding cables, power Wires, and electrical cables, even can be rotated 180° allodially for narrow space working