Starrett Bi-Metal Unique™ Saw Technology, with unified shank™ Jigsaw Blades will fit in virtually all jigsaw machines. Our Unique™ Blades feature 170% more weld contact area than standard bi-metal blades through the Unique™ solid-state diffusion bonding process. This ensures exceptionally strong teeth, combined with the multiple cutting edges and split chip advantage, ensuring that Starrett Jigsaw Blades typically last 25% longer than directly competing products.