Review on Eyech Center Hinge Centering Hole 5: Achieve Perfect Alignment for Efficient Hinge Installation by Shane Minter

I bought these primarily for cabinet hinges and they work well for that, but I use them for many other projects as well. You really need to clean them first as mine were filled with some kind of light grease that interfered with their work, they were sticky. After cleaning I used some dry PTFE lube. Since then they have been working fine. Treat them like a drill and protect them, they will not survive hard falls. Even the more expensive one doesn't survive a fall, ask me how I know that :0