Tronixpro 55mm Pro Series 5 Snap On Lens Caps and 5 Lens Cap Keepers For Canon, Nikon, Pentax, Fujifilm, Sony, Panasonic, Olympus & More Models Protect lens surface from dust & shock during storage Unique snap on design allows easy installation onto the lens & one-step removal from the lens. It fits directly onto the lens with a double-action spring design. 5 Lens Cap Keepers Included 5 55mm Snap On Lens Caps