The HAIDA M10 system is a high-quality modular filter mounting system made entirely of aluminium, adapted to use innovative Drop-in filters as well as traditional square filters with dimensions of 100x100, 100x150 It allows the simultaneous use of CP-L Drop-In polarizing filter together with other filters. Unlike other manufacturers' holders, it does not require disassembly of the entire holder to remove it. This is an invaluable feature and also an advantage, especially during bad or rapidly changing weather conditions. After several months of using the Haida M10 holder, I am delighted with it; it is the best holder available on the market. Working with Haida M10 holder is sensational, fast and convenient.