I carry several different brands of multi-tools in the saddle bags of my bikes, but when I am working on a bike in my garage I prefer to use products made by Park Tool Company. In fact, if you scroll to the bottom of the “My Bikes” page you will see that my garage almost looks like a Park Tool showroom. On the wall in my work area I have a set of Park Tool P-Handle Hex Wrenches and they are the wrenches I use when I need to apply a lot of torque, but most of the time when I need a hex wrench I use the Park Tool AWS-10 Fold-up Hex Wrench Set.
The Park Tool AWS-10 Fold-up Hex Wrench Set has seven hex wrenches (1.5mm, 2mm, 2.5mm, 3mm, 4mm, 5mm, and 6mm) and they are made from Bondhus Protanium, a high quality industrial steel that should give a many years of use. These wrenches have chamfered tips which makes them a pleasure to work with, and the wrenches all fold up into a slip-resistant composite handle. This handle feels very comfortable in your hand and that is probably the reason I like this product so well.
This tool weighs 3.7 ounces (104 grams) and measures 3.75″ long by .75″ tall and 1″ wide. While you could easily carry this with you as you ride I prefer more compact and lighter weight wrench sets for my saddle bags. However, at home when I care more about ease of use that I do weight I prefer this wrench set. In fact, I think you could walk into just about any bike shop in America as see that this is the tool most bike shop mechanics carry in their apron pockets.
The Park Tool AWS-10 Fold-up Hex Wrench Set retails for under $9 and is available at most bike shops. If your local shop does not carry this product they can easily order it for you—or you can visit Amazon.com and order it yourself.