I reproduced @Lumanieri's "Makita 18V Battery & Drill Heavy Duty Mounts/Holders" with a larger contact area on the end so it can be printed standing upright, resulting in layer lines orthogonal to the force applied to this mount when tools are hanging upside-down.
I printed mine in Prusament Orange PETG with a 0.8mm nozzle. No support needed. Happy making!
The author remixed this model.