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 sharp, durable 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.