【Package Include】There are totally 10 sets of assorted bolts and nuts in each carton paper package, plus a hex wrench to help you complete the installation without trouble. It is very practical and easy to store, not difficult to lose the accessories. 【Anti-Rust and Durable】The binding screw post is made of high quality carbon steel, black powder coated, hard and durable. It is not easy to rust and can be used in damp places. 【Exquisite workmanship】The bolt thread is clear and deep, without burrs, which can achieve a very strong fastening effect; moreover, the interior hexagon groove design can be matched well with the hexagon wrench to prevent slippage during installation. 【Easy to Use】 First, open a hole 0.5mm larger than the diameter of the nut rod, put the screws and nuts on both sides of the object to be locked, then use a wrench hex or a suitable tool to lock it and complete the fixing. 【Wide Application】This binding screw post is suitable for slim photo albums, decorative bags,