Noun
a hammer with a cleft at one end for pulling nails
Source: WordNetShown here are: A. Ball-peen hammer B. Straight-peen hammer C. Cross-peen hammer The claw of a carpenter's hammer is frequently used to remove nails. Source: Internet
This is why sledge hammers, largely used in open spaces, can have handles that are much longer than a standard carpenter's hammer. Source: Internet