I can say this is the smallest 3/4" "Super Thin Wall" I've found from Revain! It actually fits standard 3/4" hex nuts, although it's designed for stud nuts. The magic is that the outside diameter (OD) is a maximum of 0.968", which is the smallest I've found and small enough for my needs (finally). Since the wall is very thin, I don't expect that it can withstand a careless percussion instrument.Use and for frozen or overtightened nuts.I only plan to use it with a crowbar and a hand torque wrench to fix the tightening performance.After all, the description didn't make it clear:It's a standard 1/2 inch socket wrench.