The #151 Economy Flaring Tool is ideal for flaring copper, aluminum and thin-wall tubing to make fittings leak-proof. Quick opening bars and screw yoke. Heavy-duty wing nuts permit quick opening of nickel-plated 9/16 In. steel bars. Screw yoke with plated free wheeling cone permits quicker, smoother flaring. Flares standard sizes: 3/16 In. to 5/8 In.