The package contains only one set (12-ply ruler) High precision: The Multi-angle measuring ruler is laser engraved (inches and centimeters), ideal for measuring angles accurately and stay clear even with a sliding ruler for a long time. Wide range of applications: ideal for woodworking, brick, tile, wood, glass, stone, laminates , construction, engineering projects, etc. High quality materials: the angle measuring ruler is made of high quality aluminum alloy, not easy to bend or rust , more durable and sturdier. [Improving Efficiency] With 12 rulers, this Multi-angle measuring ruler creates exactly the shape you want, then finds the right drilling position. By folding 12 sides, you can easily measure awkward and hard-to-follow angles and increase your productivity. Portable: small size, easy to carry, very convenient for measuring