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 needs 2. 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 requirements 3. 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 needs 4. 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 tools 5. DURABLE MATERIAL: This marking ruler is forged from excellent aluminum alloy after accurate machining, possess exquisite workmanship, and the final product is beautiful and durable Specification: Item Type: Multi Angle 3D Protractor Material: Aluminum alloy. Package List: 1 x Multi Angle 3D Protractor1 x Hex Wrench