Shallow Hook Stainless Steel Thumb Ring (Custom Order)Please read: About Custom Orders "Shallow Hook" Stainless Steel Ring With a groove to secure the string and a wrist band that prevents the ring from sliding off the thumb, Alibow's "Shallow Hook" painless ring will give you a whole new experience. The ring's design is based on the rings from the Zhou dynasty (1046BC to 256 BC). These rings require a "Shallow Hook" technique, involving bending the thumb as little as possible. If used properly, shallow