Replacement jaws great. one note of caution to prevent reaking the jaws is to never try to set a rivit that has a broken or shortened shaft as only the tips of the jaw exerts pressure on the rivit and will breah the jaw tip off.

The company I work for has a Marson rivet gun that was inoperable. We called Blind rivet supply and we able to find the replacement

Great replacement product, same as original.