Bosch Progressor blades offer fast, clean cuts through a wide variety of materials. Patented progressive tooth design produces fast cuts and long life in thick and thin materials. T-shank design for maximum grip and stability which fits 90 percent of all current jigsaw makes and models. This is Bosch's fastest jig saw blade in metal. It also cuts plastics up to 1-3/16-Inch and wood up to 2-5/16-Inch. The tilt-angle blade design means longer life and fast cutting. The Progressor tooth pitch runs small to large. Overall blade length is 4-Inch.