The world-wide best selling calving aid from Europe. Hangs-on to the cow whether she is standing or goes down in the middle of the job. The permanently attached holding frame fits over the cow’s hip bones, acting as a steady and fixed base from which the Calving Jack tilts and pulls regardless of whether the cow stands, sits or stretches out. This calf puller was developed after extensive institutional research into the forces required for the safest and most humane birthing assistance. All stainless steel. Standard pole is 1.6m long and long pole 1.8m long. The long pole will fit all Vink Calving Jacks. Rump frame 51cm wide (inside measurement).