Management and treatment of complex mutilated upper extremity injuries often can be challenging and at times seemingly formidable. A reconstructive surgeon's ability to mobilize, transpose, and transfer tissues has allowed not only closure of complex wounds but also restoration of function and form. Use of "spare parts" from an otherwise unsalvageable limb represents the ultimate form of reconstruction that probes the creative mind and challenges the reconstructive knowledge of the surgeon. In this article, the authors review and discuss the use of various "spare parts" in the treatment of mutilating hand injuries.