Unfortunately, unscrewing a nut or bolt is not always easy and not always done in 5 seconds. If the nut is very tight, where you can't even get a wrench through, let alone twist it, this adapter will help you out. The adapter is not only flexible, but also long enough so it works as an extension for the ratchet. The adapter can handle a lot of load, so you can use it to pry off even the oldest rusty nuts. Just don't do it with a ratchet to avoid breaking its mechanism. The extension cord can be easily connected to an electric drill, electric screwdriver, well, or twist the old-fashioned way with your hands. Versatility is the main plus of this adapter. The seller has different sizes, both in diameter and length. The longest is 300 mm.