（ Anti-theft screw + base + cover + nut）*4，
1.Anti-theft screw：M6*16，Material：10B21；Strength level 8.8；surface treatments：galvanized，48H salt spray test。 
2.base： Aluminum alloy;  silver or black oxidation, 48H salt spray test。 
3.cover：Crystal drops glue。 
4.Can be customized: according to customer needs to change the material, structure size, surface treatment, etc. Nut selection. The picture on the cover can be customized。                     
5.It is Suitable for ordinary plate fixed, one side use.