You know the feeling: you’re on a ride and you need to adjust something and discover that you’ve left your bike tool at home. We figured that if we stashed the most handy tools on the bike someplace, it would be one less thing to worry about. So Dahon designed the T-Tool – a special bar end plug and Allen tool that fit right inside the handlebar grip – invisible but always there when you need it. The patented T-Tool features 4 mm, 5 mm, and 6 mm Allen keys built into one handy unit with a long leverage design for the 5 mm and 6 mm tools. RH grip is shorter to accommodate Twist shift  130mm/100mm