"Hand spacing" refers to the distance or gap between one's hands, often when gripping something like a handle or a bar. It describes how far apart your hands are from each other when you hold onto an object. Full definition
You will have a narrow foot stance and as a result you will have a narrow hand spacing upon the bar (just wider than your feet). (fitnesscrest.com)
He's right: the extra margin around the screen gives you plenty of hand space and certainly means that we don't cover any element of the display when we are using it. (pocket-lint.com)
You should use a straight bar with shoulder width hand spacing. (fitnessandpower.com)