This ring adds 2 upper threaded M6 mounting holes to the EMWL relay lens. Theses holes are commonly used to screw strobe brackets, balls (not included, e.g. Inon, Flex-Arm). The ring is made of made of graphite filled plastic for high mechanical resistance. 

This product is also available with 1/4-20 (i.e. tripod) screws under the reference EOC-U14-EMWL. Check with us if you are unsure of what to choose.