Ridgid 36947 Model 312M is a lever bender with an O.D. tube capacity of 12-mm. This bender is designed to bend copper tubing to a maximum of 180-degree. It has offset cushion grip handles and a 90-degree start anglethattogether with a specially engineered plastic shoecombine to ease bending effort. This bender forms smooth bends in types K and L soft (annealed) copper tubing.