Child Safety Magnetic Cabinet Locks(16 Locks + 3 Keys), Baby Proof, No Tools Or Screws Needed TimberRain Extends the eyepiece 5/8" (15mm) from the camera body Reduces Viewfinder Magnification by 30%, Visibility Enhancer Useful for the Photographer with Eyeglasses to Prevent Smears Keeps the tip of the nose from touching the camera body 100% compatible with Nikon Eyecup Extender DK-21 / DK-23.