Descriptions:* Made of cold rolled steel, being nickel plated, sturdy and durable for use. One-piece , it has smooth surface and not easy to break.* Fit for 7mm shelf holes on cabinets. Install them by hands without any tools.In order to the pins to fit tightly, The holes should be equal to or a little smaller than the diameter shown* Suitable for cabinet, bookshelf, display cabinet, furniture, wardrobe, closet, cupboard, bookcase, pantry shelving, etc. Specifications: * Color: Silver Tone* Material: Zinc Alloy* Total Length: 25mm / 1-inch* Shelf Pin Diameter: 7mm / 0.28-inch* Shelf Pin Length: 10mm / 0.39-inch* Flat Thickness: 3mm / 0.12-inch* Nut External Diameter: 7.5mm / 0.29-inch Package Content: * 20 x Shelf Bracket Pegs Steps for usage:1. Use a electric drill to punch, please use the 7.5mm bit.2. Put the shelf pin into the hole. If the hole diameter is bigger then the shelf pin, please wrap a circle around it.3. Place the clapboard on the shelf pin.