The JAVAC Edge Tube Bender Set has a 90° indicator which makes 90° bends easy and perfect on the first try! Only for soft copper pipes* More info: www.javac.co.uk...
Don't be a tight arse - buy a hydraulic bender instead then you can bend hard drawn pipe as well. Also these things have serious limitations, you can't pull anything past 90 degrees or small offset bends. You still need tradtional benders as well, but for hard drawn 7/8" and 3/4", hydro benders are pretty good.....don't waste your money (or your boss's) on these.