These reflective hanging ornaments deter birds and other small animals, and can also be used as decoration. Features: Keep birds away to protect crops, windows, boats, cars. Can also be used as decoration. The double mirror design reflects strong sunlight to scare away birds. Rotating link buckle design, 360 degrees rotatable with the wind. Each round disc has two small holes and can be assembled by DIY. Made of acrylic, the edges are smooth and have high brightness in the sun. No harmful chemicals, does not harm birds. Suitable for farmland, garden, courtyard balcony, roof, etc. EASY INSTALLATION: 1. Tear off the protective film on both sides of the bird-repelling discs. 2. Install the discs and O-rings. 3. Install the rotating swivel rings on the O-rings, and then attach the hook to the swivel ring. Specifications: Material: Acrylic, Stainless Steel Assembled Size (W x H): 7.5 x 41 cm Package Contents: 4 sets of bird-repelling discs (one set contains 3 round discs)