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. The Starrett BU310DT-5 Wood Cutting Jigsaw Blades with Unified Shank. They will fit in virtually all jigsaw machines. These 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, ensure that these blades typically last 25% longer than directly competing products. Supplied as a pack of 5. Specification Length 75mm. Width 7.5mm. Thickness 1.3mm. TPI 10. Tooth Ground. Set Tapered, Downstroke Cut. Length dimension references tooth bearing section of the blades, the total length including shank is approximately 25mm longer.