Bookbinder's hammer.
Fullsize image: https://diqn32j8nouaz.cloudfront.net...r_fullsize.jpg
https://diqn32j8nouaz.cloudfront.net...ers_hammer.jpg
Previously:
https://www.homemadetools.net/forum/...029#post140886
https://www.homemadetools.net/forum/...602#post139551
https://www.homemadetools.net/forum/...986#post133913
https://www.homemadetools.net/forum/...911#post124702
https://www.homemadetools.net/forum/...489#post117099
https://www.homemadetools.net/forum/...710#post118689
