Metal Ninetooth Linkage Fingertip Spinner Fingertip Spinner Toy Adult Child

- Made of pure brass material, high-precision lathe imported from Germany,
- The size should be controlled within 1 line, with fine polishing, no burrs, and smooth rotation. (Science: 100 threads=1 millimeter)
- Main body: Aviation aluminum material, sandblasting effect, anodizing treatment, iPhone grade matte texture.
- Bearing: Imported stainless steel R188 type bearing, with good wear resistance and long idle time. (9 gears, 10 bearings, idle for 1.5 minutes)