Replacement blades for all RS-1, RS-2, and RS-3 models. Made in USA from passivated 440A surgical-grade stainless steel for durability and corrosion-resistance, with a proprietary tungsten DLC edge treatment to improve cutting efficacy and edge retention 5x better than cheap carbon steel blades. They will easily slice through multiple layers of clothing, denim, leather, neoprene wetsuits, chemical biological and radiological suits (CBRN), bandages, sports wraps, plastic packaging, seat belts, nylon webbing, and more.