I always went the cheap root and created my own magnet separator however I can tell you stop wasting your time making one and buy this. It works better and saves time.
tried it on some fines i have and it worked perfect!
I built a bb trap. Magnet works great for picking up and recycling bbs. I would buy another!
There's just 3 small magnet's and they would have a hard time picking up 8#'s! It's a nice idea but needs to be done with a single larger magnet.
4-3/8 Inch 8-Pound Magnetic Separator Pick Up with Quick Release