Meet the Jerax Tools 42mm Kindling Cracker: a wood splitting drill bit that can be used to split firewood with less effort. It has a carbon steel head with Titanium coating. The shank is welded to the bit. You can use this with an impact driver with a side handle to turn firewoods into small pieces of kindling.
In order to use this bit safely, make sure you don’t drill straight down. Always start at the edge and use your foot to keep the wood in place. More information is available here.