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 even force area, the lamp hook can withstand up to about 100 kg. Application - The hook can be used to hang ceiling fans, mosquito nets, lanterns, ceiling lamps, plants, cages, baskets, pendant lamps, chandeliers, crystal chandeliers, fixtures, etc. Material: Metal (Screw: stainless steel) Dimension: Base plate diameter: 90mm Height: 35mm Package: 2 x Round Base Ceiling Plate Kit Installation Steps: 1. Before installing the ceiling hook, you need to decide which hole to install. It is best to choose one of the holes in the correct direction towards the hook head and then choose two other holes to form a solid triangle. 2. Place the hook in the hanging position you choose and mark the position of the mounting hole in the ceiling. 3. Drill the hole according to the indicated 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 is all manual measurement. Please allow 1-3mm error. 2. The installation procedure for the hook is very simple, but we still recommend that you have it installed by a professional.