I made this yesterday as I was forever cutting myself and getting metal splinters.
It's made from a common soluble vitamin tube, a length of steel coathanger, the plastic lid liner from a coffee jar and an old refrigerator magnet..oh and a small dab of 2 part epoxy.
Total cost.. £0 maybe a fraction of a penny for the epoxy..
The pictures show how simple this is. It only takes minutes to make (if you use 5 minute epoxy) and the thing is so effective!
To use, swipe the bottom of the tube to pick up the filings/swarf then a pull on the wire over a bin to release.
The plastic ring, cut from the coffee jar lid liner stops the swarf from traveling up the tube.
Scale it up/down to suit your needs