Woodworking hand planes first discovered in archaeological digs at the lost Roman city of Pompeii. That early cutting technology had gone largely unchanged all these years later. A planer is a tool used for shaping wood, whether it is to flatten, reduce thickness or smooth out. When the tool is moved over a wood surface, a metal cutting edge shaves the wood to the desired thickness. Today, planers come as power tools, which make the job faster and easier than the early hand powered models. Tools-Plus.com has a variety of brand name planers, handheld and portable, as well as planer blades and accessories.