Most clever, most useful, most indispensable...
How many of these tools do you have?
What other tools should be in this list?
Most clever, most useful, most indispensable...
How many of these tools do you have?
What other tools should be in this list?
anniel747 
Because as beacon_dave says... 
Allows you to quick-change the nut driver after shearing its end off every time you use it.
