Tentacle Binder Clip Bases

You slide one of the metal handles of a binder clip into one of these Tentacle System bases so you can use the binder clip to hold onto anything that fits.  Binder clips have a lot of closing force.

There is one model designed to hold a medium binder clip and a separate model designed for large binder clips.

You can learn all about the Tentacle System here: https://3ddoodle.com/tentacle-system/