This is a lever supervised by Knee, as those who play Tekken will know. It shows signs of use, but I experienced no input errors or malfunctions in Tekken 8. It can be installed on Japanese arcade sticks, but please check before purchasing as installation may not be possible depending on the size and width of the arcade stick. I had it installed on a Qanba Obsidian. It will be disassembled for shipping, so the buyer will be responsible for assembly. Please feel free to ask if you have any questions about assembly.