1. Material: This lock-picking tool set is made of stainless steel with a smooth surface, which won't scratch your fingers. The handle is made of soft plastic, providing a comfortable grip. 2. Entertainment and learning: Lock-picking can be an interesting hobby and a practical skill that may help you get home smoothly when you encounter problems. It can also serve as an educational tool for cultivating children's intelligence. 3. Transparent design: Four fully transparent locks allow you to see how the key and these tools operate the precise lock cylinder, which helps you understand the working principle of locks and can be useful for locksmith training and lock-picking practice. 4. Wide application in daily life: Different lock-picking tools can be used to attempt to open various types of locks, such as bicycle locks, living room doors, padlocks, file cabinet locks, and drawer locks. 5. Name: 37-piece padlock lock-picking tool kit 6. Technical parameters: The material is stainless steel. 7. Package contents: - Four transparent padlocks - Eight keys - One key extractor - Three tension wrenches - One convenient zipper leather case - Twenty lock-picking tools