"Adzes are used for removing heavy waste, leveling, shaping, or trimming the surfaces of timber..." and boards. Generally, the user stands astride a board or log and swings the adze downwards between his feet, chipping off pieces of wood, moving backwards as they go and leaving a relatively smooth surface behind.

How old is the adze?

The adze is 10,000 years old

This pattern has only been seen before on a bone knife from Sollerön in Sweden. Whereas the decorations on the adze cannot be dated more accurately than to the Mesolithic Era, the type of the adze tells us a bit more.

Who invented adze?

Dalton adzes are flaked stone tools from Early Archaic Dalton (10,500–10,000 BP/12,000-11,500 cal BP) sites in the central United States. An experimental study on them by U.S. archaeologists Richard Yerkes and Brad Koldehoff found that the Dalton adzes were a new tool form introduced by Dalton.