Someone on here says screw doesn鈥檛 fit. Not true. It does fit but I do understand how they made the mistake. It seems like it doesn鈥檛 but it does. As long as you remove the red and blue piece that indicates hot cold, it pops out by using ur nail or a flat head screw driver. The small screw goes in there and you need the right screwdriver, hexagon looking thing, if you have a set of multiple sizes you will find something that fits. Bad part is the function after. It works but for me it鈥檚 a shitty fit. I have to put the sink handle up and down a second time most times to get water to stop running as there is a metal collar below handle that doesn鈥檛 align 100% and it can get stuck. I may have to re-look at the thing and maybe take that collar piece off. It may look ugly with part of the sink handle being exposed but it should work 100% at least.