Third-party — we resell
A hole down the middle to screw-mount, run a shaft through, or route a pole.
A hole down the middle to screw-mount, run a shaft through, or route a pole. Ring magnets are the answer when you need to fasten the magnet itself or pass something through its center - speaker assemblies, mounts and rotary work.
These links go to real listings from third-party sellers; we resell them as an affiliate. For a coded (programmable) version that aligns, latches, springs or detents on purpose, see our own store.
The same shape comes in different materials, and material sets the temperature, corrosion and cost more than the shape does.