The HERD Rack-Mounted Revolving Pull-Up Bars has taken the standard pull-up to the next level. This revolving fitness system pushes you to change the way you compete with yourself. Featuring 4 x 900mm 32mm diameter bars that lock into place, challenging your intensity with continuous movement. Mount the system at any level on your HERD Rack. Climb faster, battling for strength, or slow down by locking into a fixed position. When you are low, pull yourself up. When you are high, keep climbing. Your ultimate challenge is here!