Kumihimo Supplies: Your Best Source!
Strong Brass Magnetic Sphere Clasp 3mm, 4mm and 5mm hole
These are strong magnetic clasps that are very easy to use. Just slide the two parts in different directions and they easily unclasp, yet they are large magnets so they hold firmly while you're wearing them!
A large magnetic surface (the clasps are about 12mm in diameter). They measure about 15mm in length. Available in four finishes.