Cam operated quick-detach lever with an extra large finger loop replaces existing thumbnut mounting screw on EOTech for rapid installaton and removal. Does not change the mounting height of EOTech and allows co-witnessing with iron sights. Mfg: Gg&G SPECS: 4140 steel, matte black. 500 Series - 25/8" (6.7cm) long x 13/32" (1cm) wide. Fits EOTech models 511, 512, 551, and 552. XPS Series - 3" (7.6cm) long x 9/16" (1.4cm) wide. Fits EOTech XPS2 and XPS3 sights.