Spot welding probes

I needed some basic probes for my microwave spot welder. These are probably as basic as it gets. Just use two M3 bolts to clamp the wire in place. Pull the insulation off the wire such that the top bolt goes into insulation and the bottom bolt clamps to bare copper. Start by clamping the top bolt, then stick a 2.7 x 40 mm copper shaft (I used copper nails with the head cut off) through the small hole on the bottom of the print. Then clamp that to the wire.