Designed to fit all Lucky Duck Blinds. Will fit blinds with square tubing from 5/8” to 1”. Increase safety within the blind with these durable, rubber coated steel gun holders. Gun holder secures to the square tubing by using a set screw. Installing the Gun Holder Place the gun holder on the top crossbar of the blind. The set screw should be on the bottom of the crossbar, with the V of the gun holder towards the interior of the blind. Tighten the set screw until firmly attached.