The key really needs to be used later when tube is almost finished. I thought I would start using the key because the last tube I had of the hair cream sprung a leak. I thought the key would avoid this problem. But, the key really made the cream push out of the tube too fast to use and fell off of the tube. I plan to try it when the tube is at least halfway done (provided I can find it.) Hopefully it will work better and I won't waste product.
Well made and helps with getting the most product from the tube.