This example is from Wikipedia and should be reused under a CC BY-SA license. They can be sculpted into many shapes for the duration of this process, often leading to deep thumb-print like indentations on their surfaces called regmaglypts. From Wikipedia The ASL fingerspelling presented here is most commonly utilized https://sculpted-md-lakewood96171.blogsvirals.com/35411032/getting-my-sculpted-md-lakewood-to-work