Wendell, if memory serves, it is a hex head, and quite small - sorry I can't remember. As for adjustment, it controls vertical. Horizontal is controlled by adjustment on the headlight assembly mounts (slots in the mounting bracket).
I had reason to adjust because of a turkey strike a couple of years ago - knocked the entire assembly loose. Had to "re-glue" the mount assembly and adjust light. A learning experience for me!
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RedT, US Air Force Retired
2004 Itasca Meridian VMSpc, Pressure Pro TPMS
2003 Jeep Liberty M&G Brakes System
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