Hex. Allen Wrench Screwdriver 1.58mm (1/16") for Needle Set Screw for Pegasus, Yamato, Siruba, Singer, etc.  

Used for the needle set screw #3637 or #5292 and other applications.  Much easier to use than a standard L-shaped allen wrench. Handle color/style may vary.

For Brother, Yamato, Pegasus, Siruba etc.
 

inkFrog