Nut Driver:
5/16 inch nut driver is an absolute must for anyone who tunes. You cannot tune without this tool.
This tool has a soft, fat grip which is a hand life saver. The hard plastic kind litterly rip your hand apart after a day of tuning.
Bearing down on the reed when tuning is a must and the soft grip is the perfect lining for your hand.
This tool is also used for the Rhodes piano tone bar screws.