The Casing Hanger is designed to hang off the weight of the casing and provide an annulus seal. CASING HANGER FUNCTIONS: Supports the weight of the entire casing stringProvides annulus seal for casingMODELS AVAILABLE: C-22 (no lock screws), C-22-BP (two lock screws, 180deg apart), C-22-L (full lock screws)C-29 (no lock screws), C-29-BP (two lock screws, 180deg apart), C-29-L (full lock screws)