These Starrett blades impressed us so much during a demonstration that we decided on the spot that we had to stock them. We would highly recommend that you try them. - Unified shank fits all jigsaw machines. - Unique Bi metal technology joins the steels by solid state diffusion bonding. - Unbreakable during normal use. - Typically last 25% longer than directly competing products. - 170% greater resistance to tooth breakage. - Each blade performs many functions so fewer types are needed.