Mano (stone) connects with metate
A mano (Spanish for hand) is a ground stone tool used with a metate to process or grind food by hand.
It is also known by the Nahuatl term metlapil.History
Manos were used in prehistoric times to process wild seeds, nuts, and other food, generally used with greater frequency in the Archaic period, when people became more reliant upon local wild plant food for their diet.  Later, Manos and metates were used to process cultivated maize.In its early use in the American Southwest, the mano and metate were used to grind wild plants.  The mano began as a one-handed tool. Once the maize cultivation became more prevalent, the mano became a larger, two-handed tool that more efficiently ground food against an evolved basin or trough metate.Besides food, Manos and metates were used to separate and pulverize clay from earthen debris and stones.  The resulting clay was used for pottery-making.