Pre-installation work: This is the most important step: locate your wall studs, the bolts will tear the wall dry, and they MUST be drilled into the studs for a safe and secure connection, you need to find secure supports with a stud finder and be careful when laying. Two options: The kit includes 1 pad eyelet, 4 fixing screws, 4 expansion bolts, it is enough to install the eyelet with the fixing screws on the wooden beams or use the expansion bolts to fix it to the concrete wall or ceiling. Inoor and outdoor use: Perfect for hanging anything heavy overhead, like a swing set for the kids in the backyard and an indoor hammock for weekend recreation. It is also a great anchoring solution for resistance bands, punching bags, yoga trapeze and hanging plants. Extra Strong: All elements are made of the finest stainless steel quality, expansion bolts, set screws, chain and carabiner are 100% solid and extremely sturdy. Application: Supports 200 kg when properly attached. common accessory for a family ,gym or playground.indoor and outdoor are available.perfect for hanging swing, hammock chair, punching bag, aerial yoga systems, etc. 80cm chain makes it more versatile.