Steel Blade is designed to remove Stickers from Cars, Plastic, SUV's, Wooden Basketball Courts, Glass Shop Windows . Comes with 100 plastic razor blades so lasts a Life Time. Safe to Use and won't cut your fingers. Built to last with strong plastic material to get under the toughest decals and labels. The Double-edged razor blades are built for tough jobs. To Use in standard razor blade size and designed to fit most standard razor blade holders.