Description: Premium: The Triangle Ruler is made from sturdy Bakelite, enduring durability and longevity.Adjustable Slider: Achieve accurate positioning by easily moving or removing the slider, customizing the square to meet your needs.Clear Marking Measurements: The measurement of the Woodworking Square Protractor is clear and accurate with maser technology for improved visibility.Drill Bit Compatibility: The Measuring Ruler features a hole with a diameter of 4.5mm that can accommodate 3-4mm drill head, making drilling and nailing working easy and convenient.Multifunctional: The Woodworking square ruler is ideal for efficient and easy accurate measurements, drilling or nailing holes, and marking lines. Size Chart: 220mmx380mm/8.66inchx14.96inch Package Includes: 1 Triangle Ruler