THREAD CUTTERZ Zipper Pull and Pendant is convenient, safe and efficient. Attach it to a necklace, lanyard, or any zipper and it will always be there when you need it. Its double-sided blade quickly and efficiently cuts from either side and is recessed to prevent accidental cuts. Use this unique tool to easily slice through thread, yarn and embroidery floss cleanly with no fray. Note the zipper pull's sleek, ergonomic design includes a non-slip finger grip for increased stability and control. It is durable, rust-free (machine washable), and has no moveable parts to wear out. Enjoy this handy tool for years to come.