The leads for this spot welder are ideally held 3mm apart. Now you can hold them with one hand and the thing(s) to be welded with the other : r/functionalprint
kWeld - DIY battery spot welder kit | keenlab
Kweld spot welder - #17 by Darkie02 - How-Tos & Esk8 mechanics - esk8.news: DIY Electric Skateboard Forums
Showdown Of The Crappy Ebay Battery Spotwelders : Which One Really Sucks The Least? | ElectricBike-Blog.com