Drive-In Speaker Gulmite Crown Head Security #10 Screwdriver Nut Driver Tool
Used #10 gulmite driver in good overall condition.
Hard to find due to the fact they have been discontinued years ago.
Gulmite drivers were used in a variety of applications.
This is the most difficult size to find, and the most useful. This was used on Bally Skill Roll games, Crown buses, and movie theater drive in speakers.