To improved other brand holders like Lee or Hitech, and match to H&Y Magetic Filter System.    
A small hexagon wrench, two screws and springs  are included for installation.

By adding the H&Y magnetic filter frame to your filters you bring additional security to handling and proformance usage in the field.

Reduce fingerprints around the border of the filter. 

Quick- Snap filters into place on the front of the magnetic filter holder

Stack mount multiple filters together with ease and move them into possition.