Six Dozen Ultra Reverse Tooth Flying Dutchman Scroll Saw Blades! One Dozen of 5 Different Sizes + an extra Dozen #5 (FD-UR) Variety Intro Pack) Model: UR-Intro Six Dozen of 5 Different Sizes #1, #3, #7, #9 and an Extra #5 (72 Blades) A top-grade, high-speed fretsaw blade with every third tooth reversed for cleaner sawing. The Ultra Blades have two teeth down and one up. Cuts straighter than most other blades. Splinter free finish with little or no sanding! All these blades are 5 inches long and Pinless.