Powerful Ball Joint Rare Earth MagnetFeatures Small but very powerful: holds 2 kilograms (~5 pounds)! Steel ball rotates freely 360 on a 180 axis M3 mounting screw on ball for attachment to equipment Magnet base threaded (M3) for mounting onto a base or equipment For use with micromanipulators for the positioning and holding of optical instruments including various lighting sources and lasers, pipettes and any small parts that would benfit from the flexibility offered by this new