The second generation of Haida's innovative M10 100mm Filter Holder, the M10-II holder features a new non-slip design to allow for easier use in all weather conditions and has been redesigned with a new locking design for quicker attachment to the adapter ring, new filter guides that snap into place, eliminating the need to remove screws to add or remove a guide. Finally, the M10-II filter holder features a new locking knob that will keep the holder in place after it has been rotated. The new M10-II filter holder kit includes the redesigned M10-II drop-in Circular Polarizer and M10 series adapter ring.