Very good product, used for a screw and long nail for 2 different car tires this week. Removing the screw and nail is easy to loosen. Both bikes removed at home. The dynaplug went easily into the screw (slightly larger in diameter than the nail and used 2 plugs to stop the leak. The dynaplug was much more difficult for the nail to insert and required a lot of force, but it stopped the leak well. The diameter of the silver retainer was wider than the hole for the nail next time i will use the reaming tool first so hopefully it will be easier to insert the dynaplug i like this kit as it has 3 pre-installed inserts ready for use, one cleaning Stick and expander plus 5 extra unloaded rubber plugs Overall worth carrying this in all your vehicles which I do I received this with a nylon zip case which I like very much Seller shipped quickly and did a good job .