The claw hammer can be used for knocking, hammering, and pulling out nails.

A claw hammer can be used for knocking, hammering, and pulling out nails, but it should not be used for hammering larger workpieces. When driving nails, the hammer head should hit the nail cap flat so that the nails penetrate vertically into the wood. When pulling out the nails, it is advisable to place a wooden block on the horn to enhance the pulling force. The claw hammer should not be used as a pry tool, and attention should be paid to hammering. The surface should be flat and intact to prevent nails from flying out or hammers from slipping and injuring people.
The connection between the hammer head and the handle must be firm. If the hammer head and hammer handle are loose, or the hammer handle has splits or cracks, it cannot be used. It is better to wedge the hammer head and hammer handle in the mounting hole with a metal wedge. The length of the wedge should not be greater than 2/3 of the depth of the mounting hole.