Features: Good quality materials: aluminum alloys, it have highs strength, longterms durability, and is not easily worn, suitable for indoor and outdoor applications. Highs precisions horizontals bubble, assisting in more accurate measurement; Aluminum alloys material, lightweight and practical with clear scale and highs accuracy. Handle and ruler is tightly connect with rivets and triangular reinforcements, not easy to fall offs. Multifunctional combination angles ruler with multiple functions: 90° angles measurement, right angles measurement, 45° angles measurement, 90° angles mark, 45° angles mark, horizontals measurement, vertical measurement, depth measurement. Widely used: This ruler is widely used as woodworking measuring tool, suitable for woodworking buildings, roofs, stair, floor layouts, and pattern making, and can meet your different needs. Specifications: Material:StainlessSteel,AluminumAlloy Type:W0261A(20cm/7.87''),W0261B(25cm/9.84''),W0261C(30cm/11.81''),W0261D(50cm/19.69''),W3372A(30cm/11.81''),W3372B(50cm/19.69''),W0266B(30cm/11.81''),W0263B(25cm/9.84''x50cm/19.69'') Width:20mm/0.79'' (W0263B), 25mm/0.98''(W0266),40mm/1.57''(W3372A,W3372B),28mm/1.1''(W0261A,W0261B,W0261C,W0261D) Package Includes: 1x Right Angles 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.