1)This filter holders fit onto the camera lens by snapping on the adaptor ring to be screwed onto the lens
2)The filter holder can be insert up to 3 square filter at one time, maximizing the use of different filter to create the effects you need
3)Square filter holder is very easy to use and durable
4)The adapter and filter holder is used for setting the filters onto the camera
5)Filter holder is made of plastic and used to hold square filter. You can just slide the filter into one of the slots. It can totally slide 3 filters.
