Capacity: 3/16", 1/4", 5/16", 3/8", 7/16", 1/2", 5/8".  Screw yoke slips quickly over bars without removing heavy duty wingnuts.  Yokes have a freewheeling 45˚ plated cone for faster, smoother flaring and greater strength in flaring copper, aluminum, brass and thin wall tubing.  Large heavy-duty hardened feed thread for durability.  Long sliding T-handle provides maximum leverage.  Size individually marked on bars.  Cast iron yoke.