Luckily (or not) I had to use this flat holder for a small nail that broke through the tread before the return deadline. I just purchased this item and decided now is the time to test it out instead of calling a tow truck. I followed the directions to the "T" and the valve didn't quite fit the tire valve. I finally managed to tighten the PLASTIC connector and turn on Slime. It will not inflate the tire. Instead, the slime bottle in the repair kit began to bulge and she opened the block. (See photo) When I removed the nipple from the tire nipple, mucus spattered everywhere. Tires everywhere, asphalt. I felt like I was on one of those kids shows, High Pressure Hose Mucus. Suffice to say I got tired a few times trying to get this thing to work and each time the slime bottle would expand and damn it. do not climb on the tire.