20mm Diameter Magnet Covers for Metal Pegboard Organization.

I love using these 20mm diameter magnets (AliExpress) to hold tools on my metal pegboard. The original magnets were screwed on as I built the pegboard but they are so handy to place wherever needed to hold metal tools to the wall. The magnets can split if you allow a tool to be attracted to aggressively and they can rust. The covers prevent splitting (I've even been able to use split magnets by gluing in a cover. The ones with a center post allow it to locate in a pegboard hole without moving about. Could hot glue in place which would not necessarily be permanent if your needs change (like mine). The magnets can be screwed to wooden walls and I've got a version which allows access to the screw. I've used both 4mm and 5mm thick magnets which  both work well hence to two sizes. 

These print in basic PLA with no supports or special settings.