We present to you 6 interesting questions on the history of power tools which we just had to share.

A worker in a manufacture for sewing machine replaced the needle with a long, thin saw. That was the beginning of the jigsaw.
The inventor of the first portable saw wanted to find a better way to cut sugar cane than the normal way by using a machete.
The first electric hand drill was invented in 1895 in Germany.  Black & Decker added a pistol grip which made it possible for one person to drill without the help of another person.
Simeon North invented the first milling machine in America in 1818 which also played a significant role in making interchangeable parts possible.
1400 feet per second, therefore safety is extremely important when using a nail gun.

Resources: http://novella.mhhe.com/sites/dl/free/0078741726/326289/Power_Tools_Machine_WQ_ANS.html