When you're installing welding leads, a copper lug is very important for attaching the leads to the welder and the ground clamp. Proper attachement of lugs is a must, as they must take a lot of power, and be well connected to the wire to conduct it well, and because they at the ends of the leads, they also take strain from all the movement they will see during their life time.
Considering this, it's surprising how often I see welders that have lug improperly installed on the leads, most often resulting in the leads pulling partially or fully out of the lugs.
Step 1: Tools
It's rather simple and easy, all you need in the way of tools is -
large flat head screwdriver
and sometimes you might need some cutters for trimming the wire.
Supplies, all you need is the wire you want to make leads from, and a copper lug for your size wire.