On behalf of the Inventory Commitee,
YES !!We actually DO have the (most common) metric "tap" for derailleur hangers!It's
not one of the tools that is
left-out for gorillas to abuse, so if you need one, please ask the H.M. on duty to "
check it out to you" from the 'Special-Tools' chest in the Office. As with all of the 'Special-Tools', if you're unfamiliar with the tool, the H.M. should explain proper usage to help cut-down on damage or breakage.