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. These skip tooth blades are excellent for fast cuts that provide smooth finishes and good clearance. This blade is.045" wide x.017" thick. The TPI is 11.5 The Universal number for this blade is 7. This blade is a good general purpose blade.