Have ground and graduated main vials
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
The base of the levels features an involute groove running the length of the base
With the cross test vial, it is possible to simultaneously level in both directions
Level Type: Carpenter/Mason; Leveling Axis: Horizontal; Vertical; Rule Length: 6; Body Material: Cast Iron.