Block Neodymium Magnet With Countersunk Hole 1.Dimensions: Customized / Produce according to your needs 2.Materials: NdFeB,Grade N35 to N52 (M,H,SH,UH,EH AH) 3.Plating/Coating: Nickel,Zinc,Epoxy and etc. 4.Magnetization direction: Thickness magnetized 5.Max operating temp.: 80 to 220 degrees celsius These countersunk neodymium magnet can be used for a wide range of applications including door closures,tool hangers,and etc. The hole can be drilled according to screws applicable to M3,M4,M5,M6,M8 or custom hole sizes,so the magnets to be conveniently fixed in place.