Brass Locking Tube Magnetic Clasps, PlatinumSize: about 9mm wide, 17mm long, hole: 6mm.These Locking Tube Magnetic Clasps are great for necklaces. Each end is magnetic so make sure to align magnets in correct position before completing your project. They are also for bracelets, just add to the end of your DIY bracelets crimp in the hole.
