"When it comes to reliability, the Skil worm drive circular saw has been proving its worth since 1924. The Skil worm drive saw features an oil indicator level and relief bellows for long life. This Skil circular saw also has a die-cast aluminum motor and gear housing for durability, and a push-button blade lock for easy blade changes. Included with the Skil worm drive saw is a 7-1/4"", 24-tooth ""impact resistant"" carbide blade and a blade wrench for easy changing. It weighs only 16 pounds and has"