DeMagnetising Tool

This tool was developed by another and I just drew up the parts to be printed.
This is the post that it shows the info about the tool
http://www.homemadetools.net/forum/magnetising-demagnetising-tools-72924#post133690

I bought magnetis from eBay, this are very strong small magnetic discs, I super glued them in and also the cover. It is to be used in a drill press and works great.
https://www.ebay.com/itm/5-10-25pc-12mm-x-6mm-1-2-x-1-4-N52-Strong-Rare-Earth-Neodymium-Magnet-Disc/302030266388?ssPageName=STRK%3AMEBIDX%3AIT&var=600826135333&_trksid=p2060353.m2749.l2649