Set - There are 4 pieces oval pad eye base opened hanger ceiling hook in the package, with 8 pieces M3.5 x 25 mm screws and rubber plugs. Material - This heavy duty hook and screws are made of 304 stainless steel, waterproof, abrasion resistant, corrosion resistant, never rust and durable. Opening Design - The open eyelet hooks are very convenient when need to install or remove ropes/bolts/straps. Bearing capacity - The screw mount ceiling hook has a very strong load-bearing capacity and can bear up to 45kg. Application - The ceiling hook can be used for hanging the boat rigging, marine deck hardware, ceiling fan, plant basket, canopy, mosquito net, hammock, swing chair, Yoga training strap, boxing sandbag, etc. Color: Silver Material: Stainless steel Dimension: Hook thickness: 6 mm Base length: 60 mm Base width: 20 mm Hook opening: 12 mm Hole spacing: 43 mm Total height: 29 mm Screw sizeM3.5 x 25 mm Package: 4 x Oval base M6 anchor screw mount ceiling hooks 8 x Stainless steel screws 8 x Rubber expansion plugs This simple and utility hook can be used with various of buckles, straps, bolts and links. The opening hook is very easy to hang and remove, but you need to pay attention to the method of hanging, to ensure that the things you hang do not slip off the opening of the hook. It can be directly mounted on the ceiling, wood or roof beam for hanging hammocks, Yoga training strap, swing chairs, boxing sandbag, mosquito nets, canopies, ceiling fans, wall lamps, plant baskets, lanterns, wind chimes, decorative pendants, ropes, tools, boat riggings, marine deck hardwares, etc. Note: 1.All the above data are manually measured, please allow 1-3mm error.