For sale are 2 Neodymium Magnet they are 14mm x 3mm the hole is 4mm It is perfect size for a 1/8 rivet to fit inside. They are extremely strong magnets check out the video below.
https://youtu.be/ZeFY-EeXQV0
If you would like larger quantities check out my other listings or send me an email.
thanks for looking.