David White is the brand you trust since 1985, providing productivity tools for leveling, layout and measuring in the construction and surveying industries. LT6-900 22-power optical level-transit is modestly priced and easy to use. These instruments are designed for light construction work- leveling, turning angles and determining vertical angles. Features a vertical arc- reads to degrees (0-45). Built-in sunshade for clearer sightings. Leveling vial is top mounted for effortless viewing.