This straight hole pot neodymium magnet have not big special different than countersunk hole type,it just different on hole,and use bolt instead of screw.They can be coating with ZN,NICUNI or Black epoxy.To choice what coaitng it is basis your application environment,the black epoxy have great anti-corrosion ability,but price higher than ZN and NICUNI.See below our molds,you can choice which item good for your application.
