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. Skip teeth and reverse teeth eliminate underside tearout and provide a smooth splinterless finish with these blades. This blade is.038" wide x.016" thick. The TPI/#Rev is 12.5/9. The universal number for this blade is 5R. This blade is ideal for close radius fretwork.