Uses 4x 12.7mmx3.2mm magnets found locally in the United States. Tools it is meant for: https://www.menards.com/main/tools/hand-tools/hex-wrenches/eklind-reg-metric-t-handle-hex-key-set-6-piece/55166/p-1444429735334-c-9144.htm
Recommended Settings: 0.8 nozzle with 2 walls, top and bottom, 5% grid infill to help support the area where the magnets go.
The author hasn't provided the model origin yet.