Allen Wrench Sizes Jan 27, 2008 17:51:35 GMT -5 Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by AMP on Jan 27, 2008 17:51:35 GMT -5 It might be a 1/16" or 1.5mm wrench. And there are smaller sizes.Good to know this info since I'll be helping a friend convert his Windu FX to Ultra Saber this coming week.