Our ceiling hooks are made of metal, durable and solid,can be used for longer and maintenance free operation.content:2 pack of ceiling hooks,4 different hardware part of 1 pack, include ceiling swag hooks, metal bolts, zinc plated screws, spring toggle wings, a total of 8 pieces, enough for your home use.Size:4x3x2.5cm? WARNING: This product can expose you to chemicals including lead which is known to the State of California to cause cancer and birth defects or other reproductive harm.Swag hooks are often used to support plants and light fixtures that hang by a chain. Installing a swag hook can be tricky, but here's what you need to know how to do it right and ensure that it stays put. It's important to remember that the swag hook itself will probably support more weight than you'd ever consider putting on it, but the hardware the hook is secured with and materials it is secured to will give out much sooner.How to Install a Swag Hook1.Consider the weight of the object hung by the hook. If swag hook should fall, will someone get hurt or will an expensive piece of furniture, etc. be damaged If a plant,consider how much heavier it will become after watering, and if over watered, will the overflow damage electrical / electronic devices below2.Determine installation hardware to be used, based on support material. A typical hook will have a threaded hole, and be provided with inserts that thread into this hole. One insert will be threaded with fine threads on one end, and wider threads and a point at the other end. This insert is designed to be used when screwed directly into wood or plastic anchor (some times called a inchmollyinch) that has been pressed into a drilled hole in brick, concrete, etc. (not wallboard!). An other insert is a 2 or 3 (or longer) inch threaded rod - threads running the entire length, lacking a point. It is works with a spring loaded wing-like nut, and is called a inchtoggleinch (or sometimes a inchbutterflyinch