These pulleys are well made and a direct replacement for 3" garage door pulleys. They include all required hardware for installation. My squeaky, rattling door now open so quietly that I have to look at it to make sure I hit the open button. I expect these to last for many years.I bought these to replace my 30+ year old pulleys. What a difference! These pulleys are heavy duty, well built and super quiet. The safety cable guide is closer to the spring then my old one, but still runs smooth.I added a little more grease to the outer bearing just to keep any moisture out. Very happy with purchase highly recommend .