This adapter is a heavier duty version of the T54932A and can be used with a T54931H Break Loose Handle. It can also be used with the T54931W Wrench for torquing. The adapter and break loose handle can be used as a lightweight alternative to the T50001 High Pressure Fuel Line Wrench. It features a 16 mm Spigot input with a 1 1/4" 12 pt for GE FDL Engines.