This unique clamp features two gold-plated sides separated by plastic to make it bipolar.  It also has a PVC cover so current flows across only whatever is gripped in the clip for safety purposes. It has an easy to use bolt that allows you to adjust the gripping force so it is ideal for connecting to the more delicate parts of the body. The surface area on this one is larger and much more versatile. 

Comes on 2.5mm or 3.5 plug, in red or black. to 4mm is available if needed.