3 KudoZ points awarded for this answer. Comment: "Thanks to all of you for helping me. I think both of these answers are right, but specifically for a deep drawing press, I chose this answer. Admittedly, I had to find out what a "chuck" was and I did find that deep drawing presses use "chucks" with a certain number of "jaws" to hold the metal, however, these jaws are not like the jaws on a clamp or a vice. I concluded that "jaw height" is applicable for smaller mechanisms, such as clamps and vices, while for a very large mechanism as a deep drawing press, "opening height" is applicable. This was also confirmed in searches where I couldn't find "jaw height" used, but "opening height" used for deep drawing presses and "jaw height" for vices and clamps. Thanks again."