Bosch Progressor 4-1/2 in. x 35-Tooth Jigsaw Blades (3-Pack) are compatible with most Bosch jigsaws and other saws using a T-shank. They are designed with a progressive tooth spacing for efficient, smooth cutting of wood and wood products. Bosch Progressor for Wood blades offer fast, clean cuts through wood and wood products. T-shank design for maximum grip and stability which fits 90% of all current jigsaw makes and models.