What You Get- 20 sets Screw Post Fits total size if the screw:M620mm bolts:7.9mm12mm(0.31"0.47") . Alloy Material- Made of alloy material, which is more hard than other metal, having good anti-corrosion performance and long service time. Electroplate surface, smooth and beautiful. Easy to Install- Punch a 6mm hole first, run the screw through the hole. Then install the bolts and tighten it. . The whole work is finished. Wide Application- Widely used in home and office, such as shoes, bags, belts and bookcase. color: as show What You Get: 20 sets Screw Post Fits total size if the screw:M620mm bolts:7.9mm12mm(0.31"0.47") . Alloy Material: Made of alloy material, which is more hard than other metal, having good anti-corrosion performance and long service time. Electroplate surface, smooth and beautiful. Easy to Install: Punch a 6mm hole first, run the screw through the hole. Then install the bolts and tighten it. . The whole work is finished. Wide Application: Widely used in home and office, such as shoes, bags, belts and bookcase.