The Flex Mount Bracket System is an intuitive set of mounting brackets designed exclusively for use with the 1200lb holding force M62FG-SASM Gate Magnalock and the 2000 lb. holding force GL1 Gate Lock. Using pre-formed post channels and plates of varying lengths, a professional-looking high security gate lock mounting platform can be assembled in minutes without special tools. Post Shim Brackets are used to adapt both small and large Post Brackets to pole/post sizes smaller than 2" or 3" respectively in 1/8" increments - 1-7/8", 1-3/4", 1-5/8" 2-7/8", 2-3/4", 2-5/8", etc. When more than two shims are used together on a single post, welding the bracket to the pole/post is recommended. All necessary mounting hardware including four Post Shims, is included with each Flex-Mount Kit. FMK-SW will function with either M62FG or the GL1 where post separation is between 1" and 2-3/4"