Screws into the 52mm Thread of A Lens and Allows Revolution & Skyeye 58mm Magnetic Filters to be Used ****PLEASE NOTE**** NOT Compatible with Kase Wolverine Converts a Lens with an 52mm Filter ring for Use with Kase Revolution & Skyeye 58mm Magnetic Filters Lightweight, weighs less than 0.3 oz. ****PLEASE NOTE**** Works only with Revolution & Skyeye 58mm Magnetic Filters. ****PLEASE NOTE**** WIll NOT work with Kase Wolverine or ordinary Non Magnetic Filters. Kase Revolution 52mm to 58mm Magnetic Step Up Filter Ring Adapter