G-Lok Calc is an application for mobile devices that provides access to selected Stryker product tools, using rich and intuitive user interface and functionality. The tools provide instant access to complex technical calculations that can be used during cases to provide information in an efficient manner. G-Lok Calc is based on existing content and includes a tool that will be used to assist the surgeon in determining the appropriate GTL, Socket Depth, and G-Lok Part Number relevant to the TTL (Total Tunnel Length) and Loop Length chosen during a surgery using the VersiTomic G-Lok.