I’ve been using traditional flaring tools and flaring blocks for over 35 years, but have now switched to this tool exclusively. This design includes a swing-away stop to ensure the tubing is inserted to the exact same depth every time, thus eliminating the guesswork necessary with the old fashioned flaring tool. The dies cover the range of tubing sizes nearly every technician needs (1/4 - 3/4”), even a few metrics thrown in for good measure. The eccentric mechanism looks odd at first and you might even think it was manufactured incorrectly, but after using this tool the first time you’ll understand that by moving the conical point around to start the flare instead of pushing out all the way around, the malleable copper actually flares more smoothly with less potential for separating like can occur with the traditional design. As you approach the end of the flaring process, the point of this tool will end up centered in the tubing and the tool’s clutch will “click”. At this point, give the tool another turn or two before removing your tubing and you’ll find you have just produced a smooth and incredibly even flare every time.Unless your flaring process requires a double flare, you should seriously consider buying this tool and ditching your old one. One consideration though, this tool is engineered to be used with soft copper or aluminum tubing - not steel. The clutch mechanism would be too light to produce the same results with steel tubing.