Can plum trees be made into hairpins?

It's okay, but not great.

Mahogany, jujube, pear, ginkgo, ebony, rosewood, ash, camphor, teak, catalpa, birch, elm, pine, oak, etc. These materials are very hard, including Some will become smoother and harder after being used for a long time. The hairpins are relatively thin, so hard wood is more suitable.