Specifications: Material: Aluminum alloy body with steel or aluminum ruler optionsMeasurement Range: 0° to 180°Ruler Length: 330 mm / 12.99 inchesProtractor Size: 120 mm x 80 mm / 4.72 x 3.15 inchesScale Type: Clear laser-engraved markingsApplicable material: wood Features: 1. Highly Accurate MeasurementFeatures laser-engraved scales for precision in angle measurement and straight-edge marking.2. Versatile DesignCombines protractor and detachable ruler, suitable for woodworking, construction, and general measuring tasks.3. Premium Material ConstructionBuilt with lightweight yet rust-resistant metal for dependable use in various environments.4. User-Friendly AdjustmentsIncludes secure double knobs for quick angle settings and stable ruler attachment.5. Portable and CompactLightweight construction with detachable ruler ensures easy storage and transport. Package Included: Type #A:1 x Combination Semi-Circular Angle Finder1 x 330 mm Steel RulerType #B:1 x Combination Semi-Circular Angle Finder1 x 330 mm Aluminum Ruler Type as your choice