OPTILOCK™ scope mount rings and bases are precisely machined out of solid steel to ensure perfect mating with our integral receiver scope mount rails and optimal scope alignment. OPTILOCK™ scope mount rings come clamshell-packed in pairs. Hex key included. OPTILOCK™ scope mount rings are available in two diameters and four heights. Three lowest rings are also available in stainless steel. OPTILOCK™ scope mount rings feature a patented spherical fastening ring which makes scope mounting considerably easier. This protective sleeve also ensures that the scope body will not be scratched or damaged during mounting.