In Arthurian legend, the sword in the stone was stuck in one of these blacksmith aids on top of the stone
The Sword in the Stone chronicles Arthur's raising by his foster father Sir Ector, 
..... the top, was believed to contain the bones of the husband, and then one-third,
... [DOC] [TLE] Myths and Legends [PAR] taskpulling a sword out of a stone in which it had been lodged.