Hammer is knocked the object so that it moves or deformation tools. Most commonly used to knock the nail, correct or object open. Hammer has a wide variety of forms, common form of handle is a handle on the top. Top side is flat to knock, the other side is a hammer. Hammer shaped like horns, can also be a wedge, its function to pull out the nails. Also has a round head shape nails.

≪span style= "font-size:18px;color:#E53333; the action range. There's something called the axle, can also be applied as a lever, however performance may sometimes be combined with rotation calculations.
Ancient Greece scientist Archimedes such a ages saying: "If you give me a place to stand, you can move the Earth" this sentence is not only inspiring aphorisms, is a rigorous scientific basis.