【Premium Material】These shelf brackets are made of excellent iron metal with a nickel-plated surface, which is smooth without burrs, not easy to rust, oxidize, sturdy and durable for a long service life. 【Easy to Use】These shelf support pins are easily installed by hand. No tools are required. You can simply insert them into the corresponding holes. 【L-shaped Design】The L-shaped and 90-degree right-angle construction secures the pin in the hole in the casing. The unique design holds the pin firmly in the holes in the casing and prevents tearing. 【Wide Application】These holders are suitable for cabinets, bookshelves, display cabinets, furniture, cupboards, storage shelves, tables, chairs, etc. 【What You Get】The 5mm shelf support set comes with a total of 30 pieces. Please check the original hole size before purchasing. The hole should be equal to or slightly smaller than the diameter shown. Then simply insert the plank pins into the pre-drilled holes.