Combination Wrench JHW1229MSC WILLIAMS

With the special grooves on the open end, it does not damage the square of a bolt/nut.Since the box end is surface contact, it does not change the square of a bolt/nut and the rotational torque surely transmits.The dodecagon part is compliant with the aviation standard AS954(AS870).The box end and the open end have the same size.Width Across-Flat Dimension (mm):29Total Length (mm):395Box part: DodecagonSpecial tool steel