I just got this but haven't used it yet. It's to have on hand for one of those "Gee I wish I had this tool" moments that end up costing you valuable time either coming up with another solution or driving to the store to buy it at full retail cost. I already had such a moment that was solved using a ratcheting T-driver and proper bit, but the head was only stripped. Had the screw body been rusted as well, I would have needed this. Now I have it. Yeay. Anyway, an earlier version of this tool was supposedly not reversible, i.e. it only unscrews, not the opposite. Not sure why you'd need it to work both ways given its intended application--perhaps for the rare reverse-threaded screw, or to use with a screw removal tool--but it is indeed reversible. Look at the top of the thick part of the tool, just above the retainer ring. The following is etched into the tool around its circumference (upside down): "R -- -- L" Just beyond this, where the tool narrows into a sort of collar, that the anvil fits into, there's an etched arrow that points in the direction of the above guide. You press down on either the anvil or collar, to twist the collar to align with either the "L" or "R", then release. "L" means CW or tighten screw/bolt, "R" means CCW or untighten screw/bolt. Perhaps not all versions of this tool have this feature, but mine does. I have to replace the rotors and pads on an old car soon and the rotor's rusted pretty bad, so I might have to use this.
Picked up this item today and returned to store in less than 1 hours. Tool was rusty and needed cleaning and oiling. Left right indicators etched into tool were reversed or mislabled. L indicator tool would tighter, R indicator tool would loosen. Finally tried on one screw and bit got jammed in the adapter. Definitely not the Craftsman quality of old and did I fail to mention this tool was made in China. China makes a great many very good items from iPhones to Milwaukee tools however this was not one of those. Stay away from this one.
Works with ease and has a lifetime warranty...worth every penny