The set includes 25 pieces of 5-inch 10TPI pinless scroll saw blades and 25 pieces of 5-inch 28TPI pinless scroll saw blades. These scroll saw blades are designed for professional craftsmen who need , saw blades. These scroll saw blades pinless are precision sharpened to cut fine and complex shapes with ease. Available in a variety of TPIs and widths, this plain end scroll saw blade can be used to cut most wood, plastics, and non-ferrous metals. High Carbon Steel Material: This scroll saw blade set is made of high carbon steel material that is precision ground to cut fine and complex shapes with ease. Specification: Product Name: Scroll Saw Blades Specifications: 10 TPI, 28 TPI Colour:Black Material:Steel Package Contents: 1 set x scroll saw blades Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.