I was more concerned/interested in the frightening description about why I need this 35 dollar bolt over any other. I am in the process of replacing my timing belt sprocket and timing mark plate as both were worn out due to not being tightened down correctly.IMG_20180215_082153692.jpg You'll see the center of the plate is rounded out so I have no idea where the timing mark should be and the dark area inside the gear is filled with JB weld just in case I have to use it.