25 square hard copper wire 240 hydraulic pliers wide crimping line 120 or 240 hydraulic pliers. Threading nose terminology should be called terminals, and also known as wire nose, junction nose. As long as the wire and cable is multi-core stranded, regardless of the size should be pressed and welded line terminals. In the construction of electrical installation works we commonly used 10 square wire are single-core wire, this wire will not have to pressure, welding line terminals; 10 square and above the wire, cable for multi-core stranded wire should be pressed, welded line terminals. Pressure, the main purpose of welding wire terminals is to facilitate the connection of wires, small square wires or multi-stranded wires together. This reduces the contact resistance of the joints, and firm and reliable. There are many types of terminals, according to the material points mainly copper and aluminum, according to the shape of the most commonly used points DT, OT, UT-type, DT is generally used for large cross-sectional area of wire and cable, using crimping.