One of the biggest time wasters of working on a car is looking for a bolt or nut that fell out of its socket and bounced around somewhere between the engine, subframe, shrouds or otherwise.
In this day and age, engine bays are getting tighter which is making the problem more problematic.
The solution I have found comes from a family owned Japanese company that specializes in socketry. The sockets are high quality and Made in Japan.
The Koken Nut grips uses a ball detent to hold bolts and nuts in place: