Refined with a 10-mm. Allen socket to fit Shimano's hot LX bike crank bolt, Topeak's compact Alien II Tool features all the components that made the original Topeak Alien bike tool one of the most sought-after triathlon, touring and mountain bike accessories on the planet. Of all the Alien cycling tool offerings, the Alien II is the most balanced and comprehensive for both road touring and mountain biking, although some innovative riders think beyond their bike and take Aliens snowboarding, camping and climbing. This little wonder is so well engineered that it even includes a bottle opener for prying open those pesky European citrus-flavored soda bottles. Use one for a day and you'll never go back to anything else. For more component details, check out the complete list of features listed below: