Starrett BU214-5 Multi Purpose Jig Saw Blades with Unified Shank™ These blades 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 in a pack of 5 Specification Length 50mm ;Width 75mm Thickness 1mm TPI 14 Tooth Regular Set Wavy Capacity Non Ferrous Metal 48-64mm Wood 6-30mm & Plastic 3-12mm Length dimension references the tooth bearing section of the blades the total length including shank is approximately 25mm longer