"As many of the previous reviews, I have found that more than 50% of the hinges (I bought 3xpacks of 2) are moderately stiff to very stiff in the movement, in fact only 2 are free moving.
This isnt going to be so much of a problem for me as I bought them as an alternative to a piano hinge for mounting a drop down workbench in my Garage. However if you are going to be using these for anything where free and easy movement is required, then I suggest you check them in the shop at point of purchase so you can be sure you get good ones.
Would be nice if the description included what size screws are suitable for the countersunk holes.
At this point in time I would still recommend them as long as you take the above points into consideration."