3M™ Secure Click™ Filter Retainer, D701 (Box of 10)Used to hold 3M Secure Click Particulate Filters D7925 or D7935 in place on 3M Secure Click Cartridges D8000 Series. For use with 3M Secure Click Respirators 800 Series. The filter works with a 3M Secure Click Respirators 800 Series. Connection system works just like a seat belt. Simply align the connections and push until you hear a click. The filter is suitable for use for environments containing solid and liquid particles. Designed to hold 3M