Facom 40R Series Fast-Action Combination Wrench - OGV box end for greater torque transmission without damaging the fastener. Fast action open end for fast rotation without having to lift and reposition the wrench.....wrench automatically locks onto the next flats of the fastener after each turn. This 14mm size is very close to 9/16" and useful with most 1/4" air plugs/nipples. Satin chrome finish.