Bead chain Stops for #10 ball chain (also works with #13 bead chain) /10.0mm in diameter when in closed position Versatile Use: Can be used for fixture suspensions, pull chains, and as a stop for electrical switches Prevents Curtain Damage: Limits bead chain movement, protecting your louvers from damage caused by excessive pulling. Durable and reusable Quick Fix: Easily crimped with pliers to save your time and frustration Package Includes: 50pcs 304 stainless steel bead chain buckle, not easy to break, deform, fade or rust