Zinc effect Metal Flush hinge, Pack of 8

Out of a pack of 8, only 3 hinges open & close smoothly and squarely, the pin is bent in the rest of them preventing them from moving squarely in those that do move. The screws are so soft that they can’t be used and they’re all different sizes too some with a thread some with a hint of one. Not happy.

Screw heads are made of cheese, rounded off with only slight pressure on bit. Countersunk holes will allow head of screw, if you can get it that far to pass right through.

I bought these hinges for hanging a pair of MDF doors to an MDF carcass. These hinges and their screws are of poor quality in their manufacture. Some of the screw heads are of different diameter and so some fall through the hinge holes. The hinge holes haven't been countersunk enough to allow the top of the screws to fit flush with the face of the hinge! So when doors are fitted they do not close fully due to the screw head binding with the opposing MDF (door and carcass).
Tried countersinking the hinge holes to improve this but was not very effective. Taking back for a refund.
Recommend not to buy if you want good fitting doors