Its fairly compact size makes it easy to throw in the glove box when you need it. So the "piercing tool" or whatever you want to call it is a bit small. So if you have weak muscles, it may be difficult to insert it into the tire if the puncture you are trying to fix is small (e.g. a nail or small screw). But to be honest, that goes for any other tool as well, so can't really blame the dynaplug for that (banging it with a hammer works well, by the way, as does wetting it to slide it in). The plug itself is almost bigger than I'd like - it's a bit big for holes made with your regular nails and screws - but on the plus side it goes nowhere once you reattach the plug. General. I've plugged several holes with this tool and none of them showed any sign of leaking afterwards, unlike some other tools I've used in the past. Dynaplug isn't the cheapest tire repair option, but it's compact, simple, and works well. All of this is worth a few bucks more in my opinion.