Featuring a lightweight but durable construction, the Lee Filters LEE100 Filter Holder uses a modular, snap-on filter slot system to hold up to three filters as well as a polarizer filter, all sold separately. Designed for 100mm-wide, 2mm-thick filters, this holder includes three pairs of snap-on filter guide blocks. A locking knob provides an adjustable connection that allows the holder to rotate 360°, which allows the use of graduated neutral density and other filters that are enhanced by varied positioning. A three-position locking knob allows the holder to be rotated or removed from an adapter ring, locked onto an adapter ring while it is rotated, or locked onto an adapter ring without rotation. Keep everything safe and secure with the included filter holder pouch and filter guide block pouch.