Behind the Door Hook - No Assembly Required These behind the door hooks are a great product right out of the box. If you don't want to reassemble your door hangers, these over the door hooks will be a better choice for you. This over the door hanger does not require any screws. Simply go through the legs of the hanger on the back of the door and hang it on the door to use. Made of sturdy space aluminum and carbon steel metal material, this door hanger hook is very strong and durable. The back door hangers are great door hangers for hanging bags, coats, bath towels and other items. Size: 39*18*3CM / 15 "L x 7 "H x 2 "D Weight: 1.3 lbs. Material: Alloy Steel Alloy Steel Color: Matte Black Type: 6 Double Hook 6 Double Hook Finish Type: Powder Coated Powder Coated, Rust Proof Finish Suitable for 4.1CM to 4. 5CM thick door panels. For 1.5 inch to 1.75 inch thick doors, the gap on the door needs to be more than 0.07 inch. Have you ever had the trouble of coming home after a busy day to find your room cluttered and your belongings piled up? This over-the-door hanger is a cost-effective solution.