The Caldwell Bipod Pivot Lock for XLA Bipods is the exact tool XLA bipod owners have been dreaming of! This pivot lock works on all XLA bipods by replacing the thumb nut with the included 10x32 thread adapter for those bipods with SAE threading. The functionality of the Pivot lock is awesome! It lets you lock the bipod pivot in place, and when you need to pivot you just flip the lever and you can shoot away. Conveniently, the lever is spring loaded so that you can more easily move it.