Flex BL Drill Bit Holder uses the stock screw and can mount behind the belt clip
Intended to be printed with embedded magnets (8mm x 2mm round) - two per slot
I used the ones from: https://www.amazon.com/dp/B09WZTSQ9Y?psc=1&ref=ppx_yo2ov_dt_b_product_details
make sure to pause at the right layer so you can insert them. Don't forget, some nozzles are magnetic and won't work
The author hasn't provided the model origin yet.