A hammer is a useful hand tool, with a weighted head and a long handle, used to deliver impact to another object. There are different types of hammer, such as a claw hammer, where the claw end is used for prying, splitting wood and smaller demolition tasks, and a ball peen hammer which is used to shape metal materials with the ball shaped head.

Hammers come in different weights, since a lighter weight hammer would be suited to a smaller household task, whereas a heavier hammer may be more appropriate for larger projects and professional construction workers.