Wiha SB 246-91 Electrician's Spirit Level for measuring and marking vertical and horizontal distances between flush boxes. The ingeniously positioned linear scales ensure users can measure in comfort, even when viewing from above. The variable distance marks for up to four flush socket boxes bring another advantage to electrical installation work. The sliding marking points for boxes allow the spirit level to be adjusted to the marking distances required by local regulations. This means the level can be used in a wide variety of situations, even on an international level. Thanks to its compact dimensions, it is also perfect for portable use and can be stored away in the Wiha electrician's case.