These are the top quality scroll saw blades woodworkers ask for by name - OLSON! Use these plain end blades with scroll or jig saws manufactured or sold by Delta, Rockwell, Powermatic, RB Industries, Hegner, Sakura, Shopsmith, Excalibur, Rexon, Sears, as well as hand-held fret and jewelers saw frames. These 5" blades will easily handle precise cutting of irregular shapes and straight cut off applications in all types of sheet materials. Double tooth blades have two teeth together followed by a flat space for efficient chip removal. They cut fast, leaving clean edges in wood and plastic. These blades work especially well on thin materials. Find all you need in one quick and easy assorted package. This package has 12 of each: #435D, #436D, #438D.