I know this product has gotten a lot of bad reviews but give it a chance. I was replacing the stop valve and supply line for a toilet and needed the compression sleeve off to replace the nut and flange. Although I was skeptical that it would work after reading these reviews, I bought it, and within 5 minutes had the sleeve and nut and flange all removed. My supply line is copper, 1/2". So, for $10 it's worth a try, and I'm a 108lb female - I didn't even need my husband's help to get this to work!
Pros: Reliable, Easy to Install, Good Instructions