The Super Snap-On lens cap protects the camera lens / sleeve / filter from mechanical damage and dirt. It has a double mount (inner and outer) so it can be successfully used on lenses with sun visors. The lanyard with a length of about 20cm allows you to tie the lid to the camera / belt, which prevents its loss. Superbly made, the quality is superior to most Chinese lens caps!!! Equipped with a lanyard with a length of about 20cmAn indispensable piece of equipment for every amateur photographer.