4 pin spanner to use with an 8mm hex to remove SRAM dub cap, or tighten it.

I used a spoke cut into 19mm long sections to press into the holes. Cut the spoke with a cut off wheel and chamfer the edges so you can get it started into the small holes. Close between smooth vice jaws to set all the pins to the same depth.

added a version to use with a chainwhip or 1" wrench - use 10mm long lengths for pins for that one.

Prusa

I3 MK3S

.3

50

bump up perimeters to support the 8mm hex and pin holes more. I used 4 or 5.