Non-Serrated vs Serrated Tips Non-Serrated blades can be used in all removal applications. Serrated - "S" blades provide a faster and more aggressive cut for glass removal. Color Coding YELLOW blades cut with the flat side of the blade tip facing and cutting against the glass surface. ORANGE reverse blades cut with the flat side of the blade tip facing and cutting against the pinchweld, underneath encapsulated glass mould.