Ridgid Model No. 310M 300 Series Plumbing Bender, 10mm Tube Size, 42mm Bend RadiusDesigned to bend copper tubing to a maximum of 180. Offset cushion grip handles and a 90 start angle, together with a specially engineered plastic shoe, combine to ease bending effort. 300 series lever benders form smooth bends in types K & L soft (annealed) copper tubing.