Hi All. I have a problem with equipment such as screw drivers, lathe tools, drills etc. becoming magnetised. Has anyone got a circuit diagram and how to build a demagnetiser, The hole size need only be about 1 1/2" square. I am hoping that some one can explain how, on paper. IE wire sizes,and what to wind the wire around ! Stan (Camborne). MODEL ENGINEERING DISCUSSION LIST. To UNSUBSCRIBE from this list, send a blank email to, modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.