Material - This industrial hook is made of iron metal, galvanized on the surface, and the screws are made of stainless steel. Load Capacity - The circular base plate has a larger and more uniform force area, the lamp hook can withstand up to approximately 100 kg. Application - The hook can be used to hang ceiling fans, mosquito nets, lanterns, ceiling lamps, plants, cages, baskets, hanging lamps, chandeliers, crystal lamps, fixtures, etc. Material: Metal (Screw: stainless steel) Dimension: Base plate diameter: 90mm Height: 35mm Package: 2 x Round Base Ceiling Plate Kits Installation Steps: 1. Before installing the ceiling hook, you need to decide which hole to install. It is better to choose one of the holes in the correct direction for the hook head and then choose two other holes to form a solid triangle. 2. Place the hook in the desired hanging position and mark the mounting hole position on the ceiling. 3. Drill the hole according to the shown position and then push the expansion plug into the hole. 4. Align the holes in the base plate with the holes in the ceiling and then tighten the screws. Note: 1. The dimensional data above are all manual measurements. Please allow 1-3 mm error. 2. The installation procedure for the hook is very simple, but we still recommend that you have it installed by a professional.