Note to all: These will also keep your white tuners from getting dirty and nasty looking. I highly recommend these chrome plated sockets. You may have to fashion a knob or handle. Clean your dirty white, tuners (nylons)with comet cleanser and give away your aluminum tuning wrenches.
PS, buy a 5 mm one also. It is a few thousandths larger than 3/16". It's good for tuning nuts that were put on unthreaded and forced to expanded just a little. RP
Emmons SKH Le Grande, Tick tack bass, Regal high strung, USA Nashville 112.
I use a nutdriver which has it's own handle. They usually come in a set but individual sizes can be bought at Menards and other hardware stores or ordered from Amazon. The cheap sets work fine and are not much more than single sizes. Harbor Freight is a good source.