This is a lot of a few OEM Yamaha tools. Yamaha MCC 300mm Model 31. Yamaha Tool Cam Chain Cutter. What I BELIEVE is a Yamaha Valve Seat & Face Cutter Set. A few assorted odds and ends. Yamaha metal case. I do not know a whole lot about these things, I did research best I could and found very little to go off. Hopefully someone that knows more than me finds them interesting. Please feel free to message me with any questions.