How to retention clips in an experiment?

How to retention clip in an experiment?
Fastening Clips (Aluminum) These three tools must be used together. They are suitable for scientific research, teaching experiments, hospitals, industrial and mining laboratories of enterprises for distillation, reflux distillation, etc. Used for fastening condensers, flasks and other instruments. It can also be used to fix the flask to an iron stand while heating on a tripod.