351-350 Clock Mounting Brackets in a set of 2. This is for a front mounting a Hermle 351 or 350 series clock movement. Do not remove all four hex nuts on the movement plates at once or it will come disassembled. Just take off the hex nuts on one side at a time, take of the two hex nuts, put this on the threads, put the hex nuts back on. Do this for the other side also and your done, you can mount your movement to the front of the wood clock case. These measure 4 3/4 inch (121mm) long and are to mount the German made Hermle 351 or 350 series clock movement.