40pcs Magnets Disc Countersunk Permanent Magnet Fastener Magnets 12mm D Disc Countersunk Pe12mmX3mm,Magnets With Holes,Countersunk Hole 4mm (Disc:12x3-4mm)
Brand: Linlinzz
Color: Disc:12x3-4mm

They are quality magnets and work well and most standard counter sunk screws fit well. Used these for alarm reed switch magnets on windows, but these work so well that Y've found other uses for them as well.Perfect for cabinet doors or glued to plastic drill bit cases and stuck on the side of you drill press.

D 12mm x H 3mm with 4mm Hole
it is Ferrite Magnets,not strong magnets,Grade 5, It is highly stablility udner difficultal environment
Countless ways to re-organize and simplify your life, There's so many ways to use magnets
Durability - magnets have high resistance to demagnetization, corrosion and oxidation
Great for all Home, Office, Craft, Science Projects and Product Manufacturing application