THREAD CUTTERZ: Quick and Convenient Sewing/Thread Cutting Solution (5-Pack) Two-sided stainless steel blade cuts through yarn, thread, & embroidery floss with ease. Stainless steel rivet and ABS plastic for ultimate durability and safety. Velcro adjustable strap to fit all sizes. Wear it on your finger or mount it where it's handy. Safe and Convenient. Can't cut yourself with the safe design. TSA allowed. Bring your ring when you travel. Great for all types of crafting including sewing, jewelry making, quilting, knitting and cross stitching.