Toolmonger has a great in depth review and test on Black & Decker’s Auto Wrench. Toolmonger says, “We were concerned about the AutoWrench’s strength, so we built a cool test rig to measure exactly how much torque it could take. Afterward we disassembled our test subject and found some parts Makers’ll definitely want to scavenge once the neighbor loses interest in his new AutoWrench.” There’s lots of pictures of the test rig build and a video of the test itself. Link.
Toolmonger Review on Black & Decker’s AutoWrench