Division channel lower bolt. Left. Right. A threaded rod with a drive head (such as hex, 12 point, torx, etc) on one end used to secure the Door Window Glass Lift Channel to it's mounting point. A threaded rod with a drive head (such as hex, 12 point, torx, etc.) on one end used to secure the Window Regulator Guide Rail to its mounting surface. Door Window Division Bar Bolt. and WAS. and Washer, Flange. Door Division Bar. Regulator Guide. Regulator Rail.