It doesn't say what the materials are unfortunately, but it appears to be just a crescent-shaped door handle and 2...slotted flat brackets, no idea of the exact name but I'm sure I've seen them in a hardware store. 1 [View with big picture] Normal seat belt guide ... The belt is twisted each time it gets on and it gets caught in the guide and it is where it gets disengaged. I can endure that the return is bad, but it is inconvenient and it can not be helped because the belt hits the neck and it hurts as I use it normally . 2 [View with big picture] By doing so, I will try to make myself referring to the contribution of Minkara seniors. I have procured materials by imitating Minkakura senior people 's posting. 3 [View with big picture] I will process this. The first is to bend down to feel good with small vice. Four [View with big picture] The other is to press on the floor and attach loose R. Five [View with big picture] I will assemble it. Something like this. 6 [View with big picture] I installed it on a seat .... I did not return like this though, but it seemed easy to draw out, it seemed to be slow, and the belt had been unwound overnight. It became comfortable!