It attached to camera with a closeable clasp and is connected by a short string to a small plastic disc that is glued to the lens cap.

Material : Plastic

Fitting Type : Pasted on Lens Cap

Cap keeper 2 has a small plastic circle that has a very strong rubbery disk attached with glue exposed when you peel aywat the wax paper covering it. It simple attached to the form of the lens cap and then attaches to the lens barrel with a small elastic band.

Material : Plastic

Fitting Type : Pasted on Lens Cap