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Coloring Encyclopedia. Hand Tool.

If you want to make something yourself, or perhaps you want to repair something that is broken - then you most certainly need good tools. Some of these tools are relatively new to mankind, but others, well, let's find out!
To start with a hammer, that is a hands down the most ancient tool in man's arsenal, with its history spanning over 3 million years! Of course, a hammer is a simple force amplifier that works by converting mechanical work into kinetic energy - that is, hitting stuff, and that activity has been around since the earliest days of man. But what is surprising, is that there are, in fact, many ancient "hammer" tools discovered by archeologists - which makes the hammer the oldest tool for which definite evidence exists.
A wrench (or spanner) on the other hand, is a quite new invention, used to turn objects, such as nuts and bolts. The first patent for a wrench was issued for Solymon Merrick of Springfield, Massachusetts, around 1858; but it is common knowledge that wrenches were around since at least the 15th century!
A saw as a tool now has some ancient roots, but not quite as ancient as hammer, by far. A tool consisting of a handle attached to a blade, wire or chain with a toothed edge, used for cutting through material, most frequently - for wood. The first documented uses of copper saws was in ancient Egypt - as far back in our history as 3000 BC! Steel soon replaced copper and bronze in the manufacture of saws, as the earliest steel saws appeared around 1200 BC.
A screwdriver is a tool for installing and removing screws, quite obvious. But not so obvious is that its history is closely tied with the invention of screws themselves. They first appeared around the late 15th century either in Germany or France; however, most of the modern screws came much later. Most of the screws used today are called "Phillips Screw" after their inventor, Henry F. Phillips, who patented them around 1933, along with a screwdriver.
So that's it with a history lesson! Remember, no matter what tools you choose, be careful when using them!