Add inches to yur height..Bullheight is the most useful for those wishing to gain height . it is sturdy, adjustable chrome plated steel chinning bar that can quickly fit any door frame by placing the two ends together and unscrewing the inner tube until the bar is as wide as your doorway. The rubber bushes compress against the door frame to take the weight of a person up to 130 kgs pressure and hold the bar in any position at any height you want.