Features: Newly upgraded three set of adjustablepositioning blocks: faster and more accurate positioning, 4.5/3mm marking hole. Easily adjustment of marking positioning position: fast and accurate drilling/nailings/marking. Auxiliaryleveling of double axises horizontals bubbles: auxiliarycalibration of level and verticality. ABS knob to adjust length/Angles: adjust the measure length and Angles. Foldable anodized ruler body: convenient storage, corrosion-resistant ruler body, clear and wear-resistantfonts, long use and not fading. Specifications: Material:AluminiumAlloy Length:Approx.650mm/25.59'' Width:50mm/1.97'' Package Includes: 1x Drilling Positioning Ruler note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color.