This is not a carved wooden hand but a close up of a 2300 year old Iron Age bog body called “Old Croghan Man”. A bog body is a human cadaver that has been naturally mummified in a peat bog. He was found in 2003 at Croghan Hill in Co. Offaly in Ireland. The man's apparently manicured nails led to speculation that he was not someone engaged in manual labor, so he possibly had a high status. The man was buried at a bog (likely once a lake) at the foot of an ancient hill that was used for kingship ceremonies by Druids, probably as a sacrifice to the gods.
The body is now on display in the National Museum of Ireland in Dublin...