I bought a miscellaneous lot of parts from a multi-sport shop closing its bike repair business. I've had fun the last few days sorting through a lot of stuff. I wound up with several bits I couldn't identify. I'm hoping you can help me out. I know the first part is a freehub body of some sort, but not being a freehub kind of guy, don't know what it's for. The couple Shimano freehubs I got in the parts mix didn't have this sort of screw connector, using a hollow 10mm allen fixing bolt instead. The second is a wrench of some sort, but for what? The third item has what looks to be the female version of the threads on the freehub body, but is somewhat smaller in diameter. The fourth looks like a brake straddle connector, but once again, like nothing I've seen in my limited experience with center pull brakes. (There are two more allen set screws holding the plastic sleeve in place.)
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Any help appreciated...