I frequently flare for JIC fittings, and this device is perfect. I've used a few tools in the past, but this is by far the best, and the price is really good compared to what's available out there.OTHER TOOLS:You'll find less expensive tools out there, between $30-$90, and they're all pretty much the same as each other. Most of these models use a clamping bar which has the clamping screw at the END of the bar. No matter how thick the bar is, it's still going to bow in the middle, which means you won't get a positive grip on the tube. This may allow the tube to slip and your flare is going to be screwed up. Also, some don't give you a good way to know if the flare has been completed or if it's been over-done, resulting in splitting.This tool solves all of those issues. The bar clamp is on the side of the flaring chuck, so no matter which tube port you use, you're getting a positive clamp on THAT particular tube. The ratcheting handle pops out when its reached a pre-determined flare point on the tubing, so you don't over or under-do the flare. This predetermined point is perfect for .250" OD / .035" W tubing.MY USE:I used this on both stainless and aluminum. It's rated for copper, aluminum, steel and stainless steel, up to a tubing thickness of .035". For my .250" tubing at this thickness, every flare was perfect. I'd crank down on the handle and after a few turns, the ratchet pops, and I'd back it out. The flare was perfect. Took maybe 30 seconds to insert the tube, lock it down and flare it.Although it's not rated for thicker tubing, and probably isn't wise to use it for such, I ran into a pinch and had to flare .064" aluminum tubing a few times. I gave it a shot, and as expected the ratchet popped a lot sooner than usual. The flare was really good but not completely done. There's a wrench spot on the handle which I attached a wrench to and gave the flare a few extra turns until I felt it was best to stop. Once I backed it off I found the flare to be great, though I would not suggest this method for high pressure use.Overall, this is the best quality non-hydraulic 37* flaring tool I've ever seen in my 10 years of needing to flare tubing.PROS:* Provides quick and flawless flares every time* Excellent value.. a lot of lesser tools sell for $30-$90, and don't adequately do the job IMO. This, for about $110, is perfect.* Ratcheting handle prevents you from over or under-doing the flare* Handle provides a wrench point in case you need to use a wrench* Positive locking bar clamp built into the flare throat, preventing tube slippage* Heavy-duty construction.. this thing is built to last a lifetime* Ridgid has several other models for other degrees in case you need 45* flares or whatnot, and they're built just like this