These are the top quality scroll saw blades woodworkers ask for by name - OLSON! Use these 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. For hand and machine sawing of wood, plastic and fibrous materials. Skip tooth blades cut fast, provide good chip clearance and smooth finishes. Find all you need in one quick and easy assorted package. This package has 12 of each: #443F, #446F #448F.