4 Dozen Spiral Reverse Blades. You get 1 dozen of Four Different Sizes. 2/0, 1, 3, 5. Top quality spiral blades for all around cutting with reverse teeth on the bottom for a close to sand free finish.These 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.