This small tool is used to clean up the workspace around the the drill press. There isn’t much critical in the design other than the magnet must fit into the nooks and crannies of the cross-slide vise of the drill press.
I also wanted the magnet to remain securely fixed while stripping off the accumulated swarf glob. I used a 1/2” rare earth magnet and placed it inside a drilled 1/2” hole and added some polyurethane glue. Later I used a grinder to remove the excess steel around the magnet leaving only a thin retainer rim.
This has worked much better that the small whisk brush I used to use.