This bit of technology was a gift and is a battery-powered adjusting wrench called the “AutoWrench” and made by Black and Decker. In my set of tools, this was an interesting addition. Seemingly it can help you easily adjust the throat size of the wrench by pushing a button. It does do that, but I never found that time savings to be worth the effort or concern of keeping fresh batteries in the thing. I imagine if I used crescent wrenches all day every day, this might be more useful. With an array of non-battery powered crescent wrenches, and in the spirit of letting go of old tech, this one is being put up to be taken by a new owner.