I was afraid these might be another case of easy-to-break Chinese-made junk. Well, they're not, and I'm happy to recommend them to anybody who needs quality stuff!
strong corks for theit size
I bought the small corks to use for an "art robot" project in class for STEM. The corks needed to be small but also strong enough to fit onto a 9V motor. The corks held up great and the art robots were a success with the students.