... of both vertical and horizon 2.heighten and longer left helper arm 3.High strength steel ped Auto repair ... position. 2.Bigger and longer body,heighten and longer left helper arm,advance the covering surface. 3.High strength ... the type and turntable in one concentric circle.5.Left supporting and pressing device,demount the tyre more easily ... auto repair equipment TIRE CHANGER U-237 WHIT LEFT HELPER ARM