Wallfish 698 #1 Posted November 20, 2014 This strange saw uses a blade with teeth on it which are like a chainsaw. Cuts about a 3/4 inch size dado joint into lumber and is believed to be used for lumber framing. 2 passes will make a groove to fit a 2 x 4 standard US stud 1 1 pmackellow and CNew reacted to this Share this post Link to post Share on other sites