Described is a linkage for coupling an external fixtaor to a brace supporting an appendage. The linkage comprises, a pair of mounting members, a pair of first elongate members, a pair of position fixing members, a second pair of elongate members and a pair of quick release mechanisms. The mounting members are selectively coupleable to the external fixator. Each of the first elongate members is rotatably coupled to a corresponding one of the mounting members. Each of the position fixing members includes first and second locking channels for slidably receiving a corresponding one of the first elongate members in the first locking channel. Each of the second elongate members is slidably received in a corresponding one of the second locking channels. The quick release mechanisms couple the pair of the first elongate members to the pair of mounting members.