Yesterday while running errands my car wouldn’t start, I thought it was the battery I tried to jump it, it would not jump. I was getting ready to call a tow truck when i noticed there was a lot of corrosion on the contacts. I pulled out my Leatherman Wave to unscrew the bolt took off the contact. I used the knife and the file to clean off the contact and then put the contact back on. The car started no problem. Having my Leatherman with me saved me, without it I would have had a really expensive tow. I already carry my Leatherman on my belt almost always, but now I will make sure to keep it with me at all times, never without it.