Attribution 4.0 International (CC BY 4.0)
You can use this work for any purpose, including commercial uses, without restriction under copyright law. You should also provide attribution to the original work, source and licence. Read more about this licence.
Credit
M0015873: Two trephination instruments for fitting a brace: exfoliating trephine and bone perforator, both 18th century. Attribution 4.0 International (CC BY 4.0). Source: Wellcome Collection.