These are packed 12 per box, per size and are available in rings sizes from 6 through 15. This inexpensive tool consists of an aluminum ring band with a steel safety curved cutting blade permanently riveted to it. The safety curved cutting blade has a blunt outer edge and rounded tip to prevent accidental injuries. Convenient and lightweight, the tool can be worn throughout the day while still performing other tasks. Saves time looking for a knife. Used extensively in the sewing industry, the laundry trade, the gardening and tree nurseries and other applications where quick cutting of thread, string or twine is required.