6 Dozen # 5 Spiral Reverse Flying Dutchman Scroll Saw Blades (half gross) You get six dozen # 5 flying dutchman spiral reverse scroll saw blades hese are the only Spiral blades that have Reverse Teeth. These blades will give you a much smoother cut with less fuzz and sanding. You will also have better control scrolling than any other spiral blades. All blades are 5"s long and pinless.