Our DIY hanging hook target kit are made of AR500 material, all hooks and brackets are powder coated black to help protect against wear and rust, they are ready to be used immediately once you receive, whatever brackets or hooks are very easy to set up and take down, no tools required. Please kindly note, all hooks and brackets are fit on 1 inch OUTER diameter pipe, EMT conduit is the best, you can buy it easily at local hardware store, to cut them pieces that the length you need. If you are looking for hanging hook DIY target kit with high hardness and high toughness, the product is absolutely what you need! Please do not hesitate, buy one today! Please search Fullbow Steel Target Hangers Hanging Hook Target Kit if you are looking for the one which are made of CRS steel material, it's cheaper a little bit.