Andis UltraEdge Blades 40 bAndis UltraEdge Clipper Blades are made from carbon-infused steel for a harder cutting surface that lasts longer. For a dependable, long-life blade, look no further than Andis UltraEdge blades. Exclusive hardening process keeps blades sharper for a longer time. Add a special chrome finish that inhibits corrosion and you have cutting solutions that will last for years.