1. Material: cotton + PET / ABS 2. Unlock mode: one key to unlock 3. Cotton material, warm touch 4. Plastic needle tough and durable not stabbing 5. No marks without needles, use more at ease 6. Range of application: quilts, socks, four-piece suits, clothes 7. Size: plastic needle model: 2.3x3cm, cloth needle model: 2.8x3cm 8. Weight: about 7g