Straight to the point info:

• Perforate the film for a perfect hold

• Easy to use, best for 35mm and 120 films

• Large hook to attach anywhere

• Weight can be added to the bottom one if necessary

• Stainless steel hardware

• Designed and 3D printed in the USA.

For the manual: Clic here

The film clips I bought never satisfied me. This design  punctures the film so the clip does not slide and that it lays nice and flat while drying. A weight can easily be added if necessary.