These fittings are well made lock together very smoothly with no leaks. Threads are cut well gave no trouble when tightening. Vastly better quality than the cheaper brands I've tried.That being said, the packaging is terrible. The fittings come sealed between a cardback plastic cover. The problem is, these fittings are heavy the adhesive holding the packaging together is weak. The first package I received was busted open missing 3 fittings. The replacement item was open as well, but fortunately all the parts were in the envelop. The parts got scuffed up rattling around but I count it as a win that I didn't have to reorder a 3rd time. For the price you pay, it'd be nice if Flexilla would give you a plastic case to store them in. Or at least fix the packaging, then they'd be worth 5 stars.

These are very well made. As I have come to expect from the FlexZilla line. The only thing I didn't catch and it was my fault, is that these fittings are slightly different in there design from my previous typ of air fitting. The type I have now is the (Industrial) class connector. The FlexZilla is a cross between the Industrial and something else. It may be there spin on the design, I am unsure. I am not an expert when it come to all the typs. Here is what I found.My old (industrial) male connector end will contact to the new FlexZilla female quick coupler just fine,no leaks or issues. But my (industrial) female coupling will not except the FlexZilla male fitting. It will not go in and lock in, it is to big. Over all I would say that I like the fittings and would buy them again. When needed I will replacement the old ones if and when they start to leak. The issue with the fittings being partly compatible isn't to big of deal I will eventually have to replace them all so I will just chang over to FlexZella fittings. As they clame they do have better air flow through the fittings. That's why the fitting is bigger.If you are looking for a good fitting set I wouldn't hesitate to buy this set they are good and well made.

Good value

As with all the Flexilla stuff I've tried, it's nice and works well now, but seems lightweight and not heavy-duty. More a home shop/garage part, probably great with light/occasional use. Swivels well, fittings machined properly; will keep and use but will go back to Milton's and Speedaire's domestic parts.

Use with flexilla air hose. Abuse them daily and they keep going

Use with flexilla air hose. Abuse them daily and they keep going

Easily scratched. Fitting was pretty scratched when it arrived. Slight leak from swivel when at full angle.

one major downside is the lobes can get dinged causing hookup to get stuck on airline. Other than than being extra careful they are great

These are really nice open flow quick connects. However, one warning. These are NOT compatible with standard low pressure fittings, only themselves. So if you are using only these couplers and fittings all around, you'll be ok. If you have std fittings or couplers on either end, you'll need to mix and match to get them to work together.

Good quality but buy cheaper ones. I can't tell any difference between these and other high flow options

I only wish they were more widely available. Buying individual pieces is expensive, but I need more plugs than couplers... ;(

While this fitting is of the utmost quality, it's not for standard hose couplings. I'd have to switch out all the fittings and hoses I have to use this, which for a few nail guns just isn't worth it. If you've got tools that require a high volume of air, the switch would be well worth the investment.