The Swampfox Honeycomb Grid Anti-Reflection Device threads by hand into the objective lens of your precision rifle scope without using any tools. The Honeycomb grid helps cut down on glare as you look through your Swampfox optic. It also prevents sunlight from glinting off of your objective lens, helping to avoid detection from your target. The steel honeycomb construction is extremely thin, making it virtually undetectable to the shooter. Honeycomb Grid is guaranteed to work with 44mm, 50mm, and 56mm objective lenses on Swampfox optics.