1. Made of heavy-duty steel material, anti-rust and corrosion-resistant, durable and sturdy to use, not easy to bend and break 2. Large load capacity, can bear about 50kg/100lb, so they are used as a large coffee table mechanism equipped with furniture hinges with springs 3. With this type of lift you can transform your regular coffee table into a functional coffee table. You can also use them to change the function of other tables 4. With them you can save a lot of space and make your home cleaner and tidy, perfect for your project 5. Easy to assemble, just attach the springs to the hinges, very easy to use Specification: Description: This pair Made of high quality steel material, anti-rust and anti-corrosion, durable and sturdy to use and not easy to bend. Since they are 2.5mm and 4.0mm thick, they can bear a large capacity of about 50kg. They are also dismantled and easy to use, depending on your needs they can be used for sitting or as a support. Nice product with good price, worth buying. Features: Made of sturdy steel material, anti-rust and anti-corrosion, durable and sturdy in use, not easy to bend and break. Large load capacity, can support about 50kg/100lb, so they can be used as hardware for large fold-up coffee table mechanisms. With this kind of lifting device, you can turn your normal coffee table into one transform into a functional coffee table. You can also use them to change the function of other tables. They can save a lot of space and make your home cleaner and tidy, perfect for your project. Easy to assemble , very easy to use. Specification: Condition: 100% new brand Color: Black (as shown) Material : Heavy-duty steel Load capacity: approx. 50 kg / 100 pounds Angle range: approx. 125 degrees Thickness: approx. 2.5 mm and 4.0 mm Folded size (L x W): approx. 340 x 102 mm / 13.4 x 4 inches Bottom size (L x H): approx. 172 x 45 mm / 6.8 x 1.8 inches Installation height: approx. 242 mm / 9.5 inches Length to the front and top: approx. 228 mm / 9.0 inches (all sizes as shown) Package weight: 1.44 kg Package included: 2 x hydraulic hinges