98 Series Machinists' Improved Levels, 4 in, 1 Vial

Features: 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