Ease of installation on any type of frame. Do you have no mounting points for a lock on your frame? The Flex mounting set offers the solution. You can securely attach each ring lock to the rear fork with the two strong clamp straps. Suitable for both aluminum and steel frames without damaging the paint. Additional information Suitable for: Rear fork (Steel/Alu). Compatible: All frame locks. Type: Clamp band mounting. Easy installation. 8711646932946 You can install a frame lock with the Simson bicycle lock mounting set Flex. With this mounting set you can mount any frame lock on any bicycle. This mounting set consists of two clamp straps that are mounted on the rear fork tube. The Simson mounting set Flex is suitable for steel and aluminum frames and is easy to assemble.