Amazon Customer 4 I was trying to use this on a small metal hole, but the hook was too wide. That's really not a fault of the product but I thought I'd mention it just in case anyone wants to hook this into a tight space. I'm deducting one star because it came with no instructions. Luckily how to modify the length is described on this page: you push the silver part in. I was trying to unscrew the top with a wrench and nearly broke it.