Olson Double Reverse Tooth Scroll Saw Blade Assortment, 18 Pieces a unique double tooth geometry designed to minimize burning and enhance chip removal efficiency. These blades feature two teeth together followed by a flat space, allowing for smoother cutting performance. Each blade measures 5 inches in length with a plain end, making them compatible with fret or scroll saws. This assortment includes 18 pieces, with six blades each of the #5RG, #7RG, and #9RG types. The #5RG blades are .045" wide, .018" thick, and have a 12/8 TPI reverse tooth pattern, i for accurate, tight radius cutting in materials 3/16" or thicker. The #7RG blades measure .047" wide, .018" thick, with a 10.5/8 TPI reverse tooth pattern, for steady, close radius cutting in materials 1/4" or thicker. The #9RG blades are .049" wide, .018" thick, and feature a 9/6 TPI reverse tooth pattern, suited for fast, close radius cutting in materials 1/2" or thicker. This assortment provides versatility for various cutting needs, ensuring precision and efficiency in your scroll saw projects. Model Number: USA18 Pc. Double Reverse Assortment