MCM Oil Tools MCM OIL TOOLS | Type F and FC Valves, Drilling Chokes, Choke and Kill Manifolds MCM Oil Tools, Inc., is a Texas-based company specializing in the manufacture of Manifolds, Gate Valves, Check Valves, Chokes, Control Consoles and OEM parts. MCM Oil Tools, Inc., is a Texas-based company specializing in the manufacture of Manifolds, Gate Valves, Check Valves, Chokes, Control Consoles and OEM parts.