Swift System (A) module (B) modules can magnetically be attached to work with square filter holder, matte box and hood Compatible with all (B) modules like bridge rings, drop-in filter rack and magnetic VND filter RevoRing features unique self-retracting blade technology with threaded ends to secure on the front of your lens Each threaded end has been designed to overlap therefore completely removing any possibility of light leak 82-95mm cannot fit Magnetic VND filter or Magnetic Drop-in rack or Clip-on filters Use of 82-95mm Magnetic Variable Adapter will require a 82-95mm Magnetic Bridge Ring