Double Edge Plastic Blades are standard size razor blades made of plastic will not scratch glass. These double-edge blades are completely safe on most any surface, but sharper than most plastic blades. Strip vinyl decals, pin stripes, and dealer stickers. Remove tar, sap, bugs, adhesive, road paint and chewing gum from interiors.Each blade features two sharp edges.Also can be used to remove pinstripes and decals. You'll find lots of uses for these safety blades! Pack of 100.