The JJC 67mm lens cap for use with lenses that feature a 68mm filter thread. Keeping the lens covered with a lens cap when not in use will protect the lens from impact, dirt, or dust. This snap on cap protect the front of your lens from dust and damage. Two spring claws at opposite sides latch inside the filter thread of the lens or the front thread of a screwed-on filter to keep the lens cap secured and your lens protected.