A calving jack is needed for assistance or human intervention during the birth of calves. It is a humane aid to safe birthing and delivery, helping to pull out the calf if there is any difficulty. The frame of the Calving Jack Hk Type has no head but is adapted flexibly to the animal by means of the swivel strap. This new design is easily handled and provides optimum grip to prevent slipping with mechanism 2020. The construction is of a thick-walled aluminium tube of length 180cm without any head.