Chopper One Axe - Wood Splitting Tool

Came across this while doing some research on wood-splitting tools and techniques. It's an axe that combines in a riveted spring, that expands out when the blade contacts the wood, forcing the downward pressure outward and helping split the round. At the least it's interesting — though so far I'm much preferring an axe with a fiberglass handle, an 8-lb. sledge, and a wood grenade (thanks Sam!)

Link: Chopper One Axe - Log Splitting Tool.