Stabila 34610 Type 106TM magnetic plate level - extends 6' to 10' - features a three chamber rectangular aluminum profile with reinforcing ribs, two coated measuring surfaces, and overhead (vial down) measurement. Extremely long extendable spirit level that adjusts for "plate to plate" measurements on most residential and commercial wall heights. Fully sealed solid rail extension eliminates flex and deflection, and delivers the smoothest extension movement available. Also featuring a top horizontal vial that is permanently positioned at eye level and plate height dimensions marked on the rail - includes one Horizontal (level) and two Vertical (plumb) vials. Vials are guaranteed for life never to fog, leak or require adjustment. Work Hands Free: Vertical, Horizontal, Overhead.