Hemorrhoidal circular staplers.
https://s3-us-west-1.amazonaws.com/h...ar_stapler.jpg
https://s3-us-west-1.amazonaws.com/h...r_stapler1.jpg
4:04 animated demonstration video:
https://www.youtube.com/watch?v=1i55sJyPQ7c&t=72
Previously:
https://www.homemadetools.net/forum/...041#post140930
https://www.homemadetools.net/forum/...159#post126129
https://www.homemadetools.net/forum/...264#post116146
https://www.homemadetools.net/forum/...518#post139357