The Steiner ARD (Anti Reflective Device) for x50 Military Binocular is crucial for maintaining concealment. Anti reflective shielding is vitally important during covert operations. Glint or a momentary reflection off your military binoculars will instantly give away your position. Glint can happen on overcast days also, so play it safe and attach this binocular accessories to your Steiner Military binocular. The Steiner A.R.D. attaches to the outside of objective lens barrel over the armoring by adjustable tension fit with a hex key (included). The Steiner ARDs fit Steiner Military type Porro-prism bodied x50mm objective sized binocular. The Steiner Anti Reflection features reduction of glare and glint up to 100%, using a new honeycomb pattern that reduces light transmission to your eyes by only 15-20%. The Steiner ARD is constructed using non-corrosive parts and utilize the same ultra-durable Nitrile Butadiene Rubber (NBR) armor that is used on Steiner’s military binocular line. Steiner Heritage Warranty Repair or replace your Steiner optic should it become damaged or defective -at no charge. No warranty card needed No receipt required Fully transferable – from generation to generation