Viper Venom Short Drive Sight Fixed Plate 3 Pin .015 RH Housing threaded front and back for a lens and or shade _x000D_ housing;Vipers removable pin track system allows you to change fibers and sight pins quick and easy;Sight pins are machined aluminum and fibers are protected inside the housing;Housing includes 3 snap on housing rings, lime green, yellow and white colors. 3 horizontal 0.015 fiber optic pins