The Starrett BU424-5 Metal Cutting Jigsaw Blades with Unified Shank will fit 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 in a pack of 5. Specification Length 100mm. Width 9.5mm. Thickness 1mm. TPI 24. Tooth Regular. Set Wavy. Length dimension references tooth bearing section of the blades, the total length including shank is approximately 25mm longer.