Features: Material: Silicone, silicone is flexible, tear-resistant, durable, easy to use and clean. Easy to use: Each mold has a pin, you can make holes on the top of the without punching. Use rope or chain to pass through easily. High quality: Help you make great bookmarks and get straight and smooth edges. It is a great gift for your friend. The refraction effect of the finished product is different at different angles under sunlight.