How to use: To cut cardboard, just hold the cutter firmly and use the serrated double - edge blade. You can cut upwards or downwards according to your needs. For peeling off labels or scoring materials, use the round chisel - edged tip. When you're done, retract the blade for safety. Note: This is not a toy, so keep it out of reach of children. Maintenance: Wipe the blade clean after each use to keep the non - stick coating effective. If it gets dirty, you can use a mild cleaner to clean it. Store it in a dry place to prevent rusting.