This is for trampoline practice. There are no cracks or deterioration in the bindings. It shows signs of use, but I think it's perfectly fine. The binding screws are designed to be secured with four screws, but I received it from an acquaintance who used only two screws, one on each side. Disassembling it reveals special screw specifications, but I think large diameter flat washers and regular screws with the same length under the head would be sufficient. As shown in the last photo, I tried to emphasize the flexibility of the flex by bending it, but unexpectedly, three lines remained in the center and on both sides. There are no breaks or any other problems. The reason for using two screws was that when the bindings were shifted, the screw holes were not perpendicular and would be covered, making it impossible to tighten the screws, so they used two screws instead.