Replacement handle for an egg beater with a ~4 mm diameter shaft. A 6 mm x 2 mm magnet holds it in place and makes it easily removable for washing. The Fusion360 model is included so it can be adapted to fit different egg beaters or different size magnets.

Since it can be removed for washing, PLA or any other filament will work. Print with the magnet end on the bed and no supports are needed. You may need a brim.