What You Get--20 sets Screw Post Fits; total size of the screw: M6 20mm; bolts:7.9mm 12mm (0.31" 0.47"). Alloy Material--Made of alloy material, which is more hard than other metal, with good anti-corrosion performance and long service life. Electroplated surface, smooth and attractive. Easy to Install--Punch a 6mm hole first, run the screw through the hole. Then install the bolts and tighten it. The installation is completed in a few simple steps. Wide Application--Suitable for use in homes and offices, ideal for items such as shoes, bags, belts, and bookshelves. Color: As shown. What You Get: 20 sets Screw Post Fits; total size of the screw: M6 20mm; bolts:7.9mm 12mm (0.31" 0.47"). Alloy Material: Made of alloy material, which is more hard than other metal, with good anti-corrosion performance and long service life. Electroplated surface, smooth and attractive. Easy to Install: Punch a 6mm hole first, run the screw through the hole. Then install the bolts and tighten it. The installation is completed in a few simple steps. Wide Application: Suitable for use in homes and offices, ideal for items such as shoes, bags, belts, and bookshelves.