So after researching every peep sight known to man, I pulled the trigger on this set. All steel, built like a tank and has 2 apertures. If your sighted in at 50 let's say, flip up the long range peep and your sighted for 100. Didn't like the looks of them at first but they grew on me. Anyway, for $60 bucks rear and front, they are a breeze to install...waiting for the snow to stop so I can shoot her!