I needed feathers to fix the kitchen with my own hands. I bought recessed lights with their own springs. However, these springs were either too long or could not support the weight of the devices. So I needed feathers. I bought this box because, hey, who wouldn't want to use a few different nibs? You will never know. I found many small springs with enough tension to get the job done. They were twisted on each end so I had to cut them to fit my application. If you are looking for hook springs, there aren't any in this box. It has a wide range of nibs, just not quite all you might need. For the price you can get anything to work. Otherwise, the only downside is that the box is a bit thin. And if you accidentally open it and the dividers fall out, you'll spend a lot of time putting everything back together. So use with caution. I'm giving this product three stars because I'll probably look elsewhere if I need a different box of nibs, but again for the price it's not a bad deal.