Feature:1. MULTIFUNCTIONAL DESIGN: This woodworking ruler is a three dimensional multifunctional tool with T marks, square feet, Angle measurements and dovetail joints for all your marking needs2. ARBITRARY MARKING: You can use the marking ruler fixed options of 30, 45, and 60 degrees to mark angles between 10 and 90 degrees, providing flexibility to adapt to a variety of requirements3. DOVETAIL MARKING RULER: The 45 degree marking ruler has dovetail templates in two sizes, giving users the flexibility to use them according to their actual needs4. FLEXIBLE USE: This woodworking ruler allow for a variety of combinations and is not restricted by the top angle, can be used alone or in combination with other tools5. DURABLE MATERIAL: This marking ruler is forged from excellent aluminum alloy after accurate machining, possess exquisite workmanship, and the final product is beautiful and durableSpecification:Item Type: Multi Angle 3D ProtractorMaterial: Aluminum alloy.Package List:1 x Multi Angle 3D Protractor1 x Hex Wrench