Morgan BK-1234 Bushing Knockers/Set - The Bushing Nokker® is an effective way to drive automotive control arm bushings into place. It fits closely over the rubber end of the bushing and comes directly into contact with the bushing flange. All of the impact is evenly distributed on the flange, thus preventing damage to the bushing. An experienced mechanic can easily drive the bushing into place with one stroke of a hammer.