Gold/ Silver Pin

◆ Traditional needle bottom ◆ Picture 2 → Photo from the back, the ground is slightly hollow and light ◆Size◆ Please refer to Figure 3 The above error is about +- 2mm ◆Material◆ alloy ◆Maintenance and use◆ Do not leave it in a humid or greasy place for a long time. When not in use, store it in a box or bag to extend its service life. Do not drop it vigorously or twist it