Features and Benefits:

• Works in channels not accessible to other tools
• Chisel rotates 360 degrees to line up parallel to bolt
• Frame is made of rugged drop-forged
• Not for use on heat-treated nuts
• Length: 6-3/4"

This universal nut cracker is used to split most stubborn nuts 7/16" (11mm) through 3/4" (19mm) across the flats.  The parallel action of the pusher cracks nuts without damaging bolt threads.  It's simple to use, just tighten the screw until the nuts splits.  Also this is a serviceable product.