Each tool bends one size. Open side type which slips over tube at any point. Makes smooth tight radius bends up to 180° with minimum effort. No scoring or flattening of tubing. Calibrated to show angle of bend. Wide hook grips tubing securely. Tool Type: Lever Type Tube Bender; Applicable Material: Aluminum; Soft Copper; Bend Radius: 3"; Tube O.D.: 3/4".