Yes very small precision phillips head screw driver. Take out old install new. Screw is small. if its broke on the inside of cover then I would magnetize the screw driver so you don't loose it inside the housing. But if it does fall in. Just remove the cover. That's simple too.
The small screw is still in the portion that broke off.
With the screw being so very small and my hands being so big, I ordered a new one when I ordered the knob.
Thank you for your input.
