The Ring Blade by Specialty Archery Products is a perfect addition to any string builder’s kit, and can be worn like a standard ring or attached to a round 1-inch surface. It features razor sharp, rust proof blades that are encased in an ABS plastic hood, providing a quick, convenient way to cut string but not yourself. The Ring Blade can cut through all types of string material: serving, bow string, and even the toughest string loop material. Velcro strap fits most fingers. SAP Ring Blade RB-BLK