Wheel Masters Level Master all-in-one RV level provides visual
side-to-side and front-to-rear leveling assistance for trailers, 5th
wheels and motorhomes. Level Master can be viewed from the driver's seat
to help locate the best level location for parking your RV. Each mark
on the side-to-side scale indicates one inch of blocking. The
front-to-rear scale is adjustable and can be easily viewed while
operating your tongue jack.