Pivot Hinge, Heavy Duty Pivot Door Hardware for Hidden Door Bookcase Hidden Door Hinge for Wood Secret Door 180 Degree Rotation Stainless Steel Invisible Pivot Hinge System - L Shape

The quality was solid and reasonably priced.

Hinges worked great for building hidden doors, and support significant amount of weight. Only thing keeping these from being 5 starts is install is not simple. Frame needs to be cut to accommodate the hardware without over cutting to accept screws. The provided screws were also an awkward length, making them too long for the doors I had, but to short to bite after cutting the frame for the top hardware. Ended up replacing most of the screws. Recommend longer screws for the top bracket to extend up into the wall frame beyond the hinge. But the all work now and serve their purpose great.

Hinge quality is superior to all I've seen, especially with this price point

I can understand why the Murphy Door bookshelf kits start at ~$2k, but for about $30 for the hinges and cost of lumber it's definitely worth the effort to install these. As the other reviews pointed out, you have to build the framing around the bookshelf door. it's got to be dead on plumb and level. There's zero forgiveness for margin of error.

The media could not be loaded. So here’s the deal. It works, and it works well. In order for it to work well, you will have to be handy enough to make it work without instructions. Measure the length from the install site to the center of each bracket, then chisel the depth and perimeter of each piece. Put the door on and see how the swing is and make sure you are lined up for a smooth close. If you are not, you will need to purchase a wood planer to plane the door or the jamb. Take it one step at a time and figure out where the hiccups are. You’ll get there.

Good quality

Easy installation just didn’t work with what I was trying to accomplish had to get a different style hinge

When it comes to installing the hinges, be prepared for a challenge if you're relying on the instructions – they're not the clearest. The trick is to build the frame around the inner piece and then install the entire assembly inside the door opening. It's important to note that you can't install these hinges after the frame is in place. The first set of hinges I received was defective, but the company was prompt in sending a replacement. Overall, the quality of the hinges feels robust. Would I order them again? Absolutely.