Bicycle chain breaker.
Fullsize image: https://diqn32j8nouaz.cloudfront.net...l_fullsize.jpg
https://diqn32j8nouaz.cloudfront.net...eaker_tool.jpg
Previously:
https://www.homemadetools.net/forum/...886#post194505
https://www.homemadetools.net/forum/...518#post197117
https://www.homemadetools.net/forum/...321#post188681
https://www.homemadetools.net/forum/...970#post187291
https://www.homemadetools.net/forum/...415#post185425
