What are these tools in this bike maintenance toolkit? I finally got around to replacing my bike's cassette, and towards that end (and expecting to replace various other consumables in the future) I decided to shell out for a Rose All2gether toolkit:



I'm puzzled by what exactly some of the tools in the kit are, namely: the big wrench below the chain whip, the thing in the upper right corner, the truncated triangle below the cassette tools, and the thing next to it. Also, the small wrench opposite to the chain tool has a 90 degree protrusion at each end.

Here's a close-up of the smaller mystery tools:



The triangular one has channels running through the other side from the corners to the opposite edge, with a circular depression machined out of the other side.

Here's a closeup of the end of the small wrench:
the big wrench below the chain whip

Is for removing the cups on shimano hollowtech II bottom bracket.

http://www.madegood.org/bikes/repair/remove-a-shimano-hollowtech-bottom-bracket/

the thing in the upper right corner

Is for screwing in the preload cap on a shimano hollowtech II bottom bracket.  The preload crap is screwed in to the non drive side crank to keep everything together before the crank is tightened onto the spindle.

http://www.madegood.org/bikes/repair/fit-a-shimano-hollowtech-crankset/

the truncated triangle below the cassette tools

Is a spoke wrench - each of the 3 sides fit a different size of spoke as per the numbers on the corner.  You fit the side over the spoke nipple and the spoke can be tightened/loosened as required.

and the thing next to it.

That's a crank puller for removing cranks from an internal bottom bracket.  There's a cap you unscrew with a hex wrench and then that tool screws into the thread the cap was screwed into.  You then tighten the other end with a spanner which pushes the black bit through and pulls the cranks off.

https://www.parktool.com/blog/repair-help/crank-removal-and-installation-three-piece

Also, the small wrench opposite to the chain tool has a 90 degree protrusion at each end.

This is for removing chain-ring bolts.

http://www.bikeradar.com/gear/article/how-to-change-chainrings-video-42644/