The Haida 100mm Enthusiast Filter Kit includes two filters that can be used individually or in various combinations to improve the results of your photography by preventing overexposure, as well as a circular polarizer to prevent distracting reflections or glare. To allow these filters to be placed in front of a lens, this kit contains a 100-PRO Filter Holder that is designed to allow for the convenient use of up to three 100mm wide, 2mm thick filters along with the included circular polarizer. Use of the filter holder can be easily accomplished by first screwing an included 67, 72, 77, or 82mm filter holder adapter ring onto a lens with corresponding front filter threads. A durable nylon pouch is provided for storage and transport along with a microfiber cleaning cloth to maintain the clarity of the filters' glass surfaces.