https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/14009206Edit ImageSaveSaveEditCropCustom TextSurgical instruments for trepanning. Engraving by Mutlow.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 900 x 1200 px | 300 dpiLarge JPEG 1425 x 1900 px | 300 dpiFree DownloadSurgical instruments for trepanning. Engraving by Mutlow.More