A tool to hold a threading die (25mm diamter) made for 3/8 ratchets. Small holes for the holder are 2,8mm and threaded to M3, m4 could maybe work aswell.
I printed it upright without support in PC-Blend at 0.15 layer height with 0,4 nozzle(MK3S), havent tried any other materials.
The author hasn't provided the model origin yet.