Replacement Combo Pack Includes 3 Blades for Craft Cutting Machines compatible with Bridge Cricut Air Expression 2 Explore Maker Refine cutters 2 standard and 1 deep cut blade included 3 Blades for Bridge, US Cutters, Cricut, Cricut Evolve, style machines Made of carbide vs metal Last 3 times as long Same as the red/green & blue cap replacment blades, FACTORY DIRECT USA