Jan 06, 2009· You can ruff out a work piece on any ratty old mill and take a clean up cut on the jig borer and come out with a masterpiece. And it's easy! Jig borers are quiet as a mouse and strong as a bull. Even the little ones just love cutting alloy steel and cast iron. Rough out a piece of Carpenter's Stentor and finish it on a jig borer.