Our Shock Collar by Sims surrounds the outside edges of the lens with Navcom and nests it into our two-part lens capture system. This eliminates stress on the lens caused by tightening glass between two rigid pieces of metal and significantly reduces damaging vibration. Swarovski Optik lens designed specifically for archery. Clearest, non-glare producing scope with world-famous SWARODUR anti-reflective coating. Maximum light gathering and lightweight sculpted scope body. SIMS vibration reducing features, non-glare level. Versatility of 4 fiber post and 2 scope level mounting positions. 42mm lenses in various diopters. .60 Kit.