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.