Not compatible with Ryobi P238 impact wrench. Not suitable for Ryobi P238 impact wrenches. They were supposed to be for impact wrenches, but they made the ends too long, just over 1/16 inch, so the reversible ones don't fit my Ryobi impact wrench because of that. I could grind the ends of a square disc but I can't with T20 or Philips ends. Waste of money due to bad design.