Originally designed for professional Pro Tour mechanics, and ideal for cleaning and general repair work on any bicycle where clamping the seat post or frame is not ideal. The PRS-22.2 firmly holds any bike by supporting the bottom bracket, then locking either the front or rear dropouts. The PRS-22.2 is height adjustable from 30" to 45" (76 to 114 cm) and rotates 360 degrees for easy access to all areas of the bike.