The Benro Master 100mm Filter Holder is our most popular filter holder, designed to securely hold drop-in filters up to 100mm wide and 2mm thick. The 100mm filter holder is compatible with 72mm, 77mm, 82mm, 86mm and 95mm lens mounting rings. Unlike other filter holders, our patented design allows you to easily rotate circular polarizing filters without having to first adjust or remove other filters or components.