Powerbuilt 640491 21mm Long Pattern Combination Wrench Superb fit, finish and performance Built to full ANSI length - no quality shortcuts Beveled flats for easy mating to bolts 15 Degree offset for knuckle clearance Extended length for additional torque Extra length for more leverage and torque Mirror-polished drop forged steel construction 15 Degree offset and chamfered walls for easy mating to fasteners Boxed end features Z-Drive - contacts flats walls of fasteners for better grip Meets or exceeds ANSI standards - lifetime warranty