Best Selling Aluminum Alloy Tower Ruler of Level Gauge 3M 5M 7M and Measuring Ruler Expansion and Contraction

This telescopic tower ruler (leveling staff) is a professional survey measuring tool cooperated with construction laser level and optical leveling instrument. Adopted premium aluminum alloy material, it features light weight and outstanding toughness, effectively resisting bending and abrasion on construction sites. Multi-stage retractable structure can be freely stretched to the full length and locked firmly by built-in clips. Clear black & red measuring scales against white background deliver excellent readability under different light conditions. Compact size after folding, effortless to transport and store. Great accessory for surveyors, builders and decorators, widely used in building construction, road engineering, land leveling, indoor renovation and outdoor survey layout.