The finest metallic abrasion is held back. As a result, wear is identified early and any abrasions are removed from the oil system. We have this plug manufactured as a flat Allen bolt, so that it fits tightly and does not protrude.
Note: All sump plugs sold here include a new copper washer. It is recommended to change the washer whenever the plug is removed to avoid annoying oil leaks (also with original plug). So, whenever changing oil dont forget to order a new one!