Wooden rings are designed for fitness training, which is more challenging than pull-ups. This ring is built from 32mm diameter birch wood and is mainly used in strength training. The wood material is strong, durable, light weight, easy to carry and can be assembled quickly. The wooden rings are smooth to the touch and have a strong grip, polyester webbing is stronger, and the iron buckle allows free adjustment of the sling length and a firm snap lock, making it a favored device for many sports.