AltiVate Reverse INSTRUMENTATION, HUMERAL SOCKET SHELL TRIAL, STANDARD, REF 804-06-152, Qty: 01, Encore Medical, LP Orthopedic surgical instrument. || Product Usage: || The humeral socket shell trial is used to replicate/trial the shell geometry of the AltiVate Reverse Standard Shell Humeral Stem implants. It assembles to the humeral broaches by a screw in order to replicate/trial the entire humeral stem implant geometry prior to implantation.