I recently had to repair a simple nail puncture and had previously used this tool successfully. This time, however, for some reason I had a heck of a lot of time. I couldn't get the plug to pierce the tire on the other side. I went through four plugs before getting a good result. I tried to push the connector and the brass head broke off or, worse, didn't fully seat in the strap but didn't stick out. I eventually drilled a hole and was able to fit through the strap, but those 64-year-old arthritic hands were screaming in pain.