This bicycle tool is an "all-in-one." It combines a C02 cart with different sized allen wrenches, a tire pry, a small tool removeable edge that can function as a phillips or flat head screw driver and a chain pop/connector. Not only it is nicely sized and convenient, it's can be found for around $30. I've personally used mine on serveral occasions. My favorite part of the C02 is that it seals tightly and when a new bottle goes in, you install it upside down so it doesn't pop the skin (thus no chance of it coming loose and you wasted precious carbon). The tool slips in my backpack, weighs a little over 1lbs, and will adapt to regular tube tires and road bike tires. Website says: Compatible with 16-gram Blackburn or Innovations threadless cartridges (one included) 3, 4, 5, 6 and 8mm hex key Torx T-25 wrench Fills mountain tires to 40psi or road tires to 125psi Safety Switch Chain tool (works with 4mm in tire lever) Steel core tire lever Phillips/Flat screwdriver Presta/Schrader compatible Tire Lever with built in 4mm hex key (Best of all) Lifetime warranty

I just got my new bike.  It's a Windsor "The Hour" in "Matt Gray."  Strange it's not "matte" but it was less than $300 shipped - so let it be.  It's a cheap fixed gear that is sure to provide a few hours of fun a day.  The only thing name brand on it is the cardboard box it came in.  Stay tuned for pictures, maybe video, and the review.