According to the thumbnail on my phone, this is exactly what I need. They're not, they're huge! Definitely a design for a large diameter puncture in a car or truck tire. I thought they were small enough for a bike. You are not. I'm going to break it down and get it working since I've invested almost $7 in it. I have to get it working. I'll make sure it works. However, it looks like a great product.