Just like most things, they are not as good or durable as the older ones. I have a manual grease gun that I used for 7 years as a general line mechanic in both a Chevy and Ford dealerships. I inherited it from one of my uncles who was a pipefitter when I was in high school. I still use it today and it is still working as good as it ever has. This thing has to be over 50 years old.