TEMCo TH0028 HVAC Refrigeration Ratchet Tubing Bender Soft Copper Aluminum Tube 5 Year Warranty Includes Metal Die Sets: ", 5/16", ", ", ", ", " Ball-LOC Ram Shaft Die Retention System Speeds Die Changes While Holding Set Securely Bends Soft (annealed) Copper, Aluminum up to 0.04" Wall thickness Hardened Steel Ratchet Mechanism is Guaranteed to Outlast Generic Models. Quick, Effortless and Simple to Operate. Produces Perfect, Uniform Bends every time.