I bought these with idea of using all 12 magnets on a 2.5" dust collects coupler (6 on each side) on my DeWalte table saw. I drilled 6 holes on each coupler, but tried it with 3 magnets on each coupler to see how strong the magnets really are.
Very strong!
I literally had to twist the couplers apart in order to separate them, these would not pull apart easy.
Since I only needed 6 magnets for one set of couplers, I now have 6 more magnets to build another set of dust collection couplers.

Awesome bunch of folks there willing to help with any issues

THE MAGNETS I PURCHASED ARE BEING USED PER INFORMATION FROM UTUBE VIDEOS TO HAVE THE VALANCES ON PLANTATION SHUTTERS TO REPLACE THE PLASTIC CLIPS THAT ARE WORN OR BROKEN. THEY ARE STRONG AND WORK VERY WELL.

Exactly as described, perfectly formed, very strong. Arrived promptly in perfect condition. Would definitely buy again.