The BBB Maxifold 14 tool is a good size and can be slipped into your pocket without a problem. The sturdy build means it can be treated rough without fear of breaking it.
The chain tool folds away in a very innovative way and the folding handle can be used as a tyre lever in an impressive feat of multi-tasking. It can be a little awkward to use at times, though.
Tools-wise, you get everything that’s essential for trail maintenance, and there’s plenty of leverage thanks to the stiff body.