"Each tool bends one size. Openside type. Handy in a tight spot. Makes precision short radius bends up to 180° with minimum effort. Keeps tube round, no marks or scrapes, shows bend degree. Unique extra strong hook grips tubing securely. " "Capacity: Individual tools for bending eight sizes from 1/8” to 3/4” O.D. tubing. Will bend annealed copper, annealed steel, including JIC, stainless steel and all soft " tubing.