I recently brought from Banggood a support for having a third hand during soldering operations…
the support is made by an aluminum base and three arms which end with a crocodile clamp with insulating sheath:
The assembly is very simple, the arms must be screwed on the base:
In general this support is very useful; the arms are very well articulated and their length allows to “grasp” even medium-sized cards:
The only defect is the position of the feet, which makes the base not too stable: