A prosthetic instrument is provided for attaching to a forearm shaft of an upper limb amputee to enable receipt of a handle, such as a weight-lifting barbell. The instrument includes a rod having a proximal end for receiving the forearm shaft and a distal end and a yoke having a pair of prongs that extend from a bridge that connects to the distal end, wherein said pair of prongs provide a gap into which to insert the handle. Each prong includes a through-hole along a common axis to accommodate a clamp pin to secure the handle.
