Instead of using whatever happens to be handy (and fits), use the Caulk Saver to plug the tip of used caulk tubes. The nail never worked that well to begin with. The Caulk Saver is tapered and ribbed so you can push it in as far as you need to seal up the tip - no matter where you cut the tip. If the Caulk Saver is too long, cut it off. Caulk Saver comes in a 6-pack of orange, or color code your supply with a 6-pack of multi-colored Savers. Made in China.