Hammer Screw Winchester 1892, 1894, model 64, 55 and model 53

This is the hammer screw Winchester model 1892 and 1894 and model 64 and model 55 . The hammer screw goes through the left side of the receiver (passes through holes in lower tang) and threads into the other side of the receiver. It provides a pivot hammer and also secures the lower tang onto the receiver.