I bought 4 Monroe Gas Magnum shocks to completely replace the shocks on my truck. I took three hits, opened the fourth and found there was no hardware! Right now I'm writing my review out of anger. Uncontrollable seething anger. I don't know how they work. I don't know how long they last. What I do know for sure is that it's Friday night and I have a three shock truck and Monroe won't get on the phone to send me gear until Monday morning. That means I won't get my equipment until Wednesday or Thursday. I understand that mistakes happen, but my weekends and the first part of next week will not be fun. Monroe, this is your fault. Forget you.