Mission accomplished! Holds nipple fine.

DIY Nipple Driver

Old, broken nose screwdriver...
It was covered with silicone and paint...To remove, I attached it to a drill chuck...
By using the drill and sandpaper, clean the shaft and the handle...
Using angle grinder (or Dremel), cut 2 slots near the edges slowly, testing each time if it fits the nipple...
Mission accomplished! Holds nipple fine.

DIY nipple driver for building wheels – made out of old screwdriver