Easy to use: Simply peel off the backing and hook the sides of the card, then stick it to the desired material, press firmly, and you're done. Material: Made of high-quality polyester and nylon materials, the coin has strong adhesion and can be removed without leaving any residue or damaging the surface. How to use: Please keep the surface of the object clean, smooth, dust-free, and water-free. Cold weather can affect adhesion and removal; please warm it with a hairdryer. After applying the adhesive, press firmly and wait 48 hours. Wide use: These products are suitable for smooth surfaces such as plastic, glass, metal, wood, etc.; ideal for DIY projects, crafts, hanging textbooks, posters, diagrams, etc. Package contents: 50 pairs of self-adhesive coins, 10 mm in diameter. You will receive a total of 100 adhesive points: 50 hooks and 50 loops.