I purchased this about two years ago, but it has been stored unopened and unused. 【Quick Release Design, Easy to Attach and Detach】The seat post mounting part has a quick-release lever. Quickly and easily secure the seat post and rear frame. 【Excellent Material】Lightweight and highly rigid aluminum alloy bicycle rear carrier. The plate part is rust-resistant and also serves as a mudguard, so you can ride with peace of mind even on rainy days. 【Super Load Capacity】Maximum load 90KG. Supported by three points, the weight is distributed, providing better stability, and it is possible to load heavy luggage. Pannier bags can also be attached. 【Safe Night Riding】Equipped with a reflector, it has strong warning properties, making night riding safe. It comes with a belt that is convenient for loading luggage, and it can securely fix the luggage. 【Wide Range of Applications】Applicable to most bicycle types such as cross bikes, mountain bikes, road bikes, small tire bikes, and folding bikes. ※There was no instruction manual from the time of purchase.