Magnetic Mini screwdriver I designed in Tinkercad. It has an optional hole in handle to fit an 8mm x 2mm magnet inside and help hold screws.

The magnet may have a tight fit but you can use a something solid to press it in once you get it started, then you can insert the plug which also may seem a bit tight but once you get it started you can press that end against a table or something solid and it should seat flush once it hits the magnet.

My Settings: .20 layers, 20% adaptive cubic with combination infill (checked), 5 bottom and top shells

Support: I didnt need support or brims as I am fortunate to have the Biqu frostbite/glacier plates (love these and highly recommend) but if you dont have them or a sliceworx type plate, you may want to add a 5-10 mm outer brim to help stabilize them and/or supports, just use your best judgement on if you need them or not.