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.