Combo 45/60-6 Replacement Deep Cut Standard Blades for Cutting Machines Compatible with Bridge Cricut Air Expression 2 Explore Maker Refine Craft Cutters 3-45 (regular) & 3-60 (deep cut) degree blade angle Craft machine replacement blades Made of carbide vs metal Last 3 times as long Same as the red and blue cap replacment blades, FACTORY DIRECT!