The circular saw is one of the most important and efficient power tools on the job site. In this article we will apply the circular saw (“Skil”, “sidewinder”, “worm-drive”) to the purpose of ripping planks.Begin with safetyRegardless of the involved power tool, safety comes first in every task. Understand the risks of using your tool. Know how to protect yourself and others. As to the circular saw, here are some fundamental safety pointers:1.%09Check your saw for any loose parts and/or a damaged power cord. Use a sharp cutting blade;2.%09Wear eye protection;3.%09Limit the maximum blade extension to 1/8” beyond the thickness of the board to be cut;4.%09Make certain that drop material can fall away from the saw;5.%09Never change blades without unplugging or removing the saw’s power source;6.