- With the cross test vial, it is possible to simultaneously level in both directions
- These levels have ground and graduated main vials
- The base of the levels features an involute groove running the length of the base, which provides a reliable seat for round work
- Cross test vial
- These vials are adjustable to a positive setting and are housed in a satin finished brass tube with a friction-fit closing cover to prevent breakage
- Main level vials have graduations that are approximately 80-90 seconds or .005" per foot (0.42mm per meter)
- Length (in) 6"
- Length (mm) 150mm