Durable engineering plastic, high hardness, drop resistance, strong and durable, easy to carry. There are 45-degree and 25-degree graduations on the right-angle positioning ruler to facilitate angle measurement. The scale is clear, durable, and wear-resistant, allowing for quick measurement and easy reading. Ideal for woodworking right angle positioning and use as a fixed angle ruler. Right angle tool enables accurate vertical measurements anytime. Product: Right-angle Auxiliary Positioner Item Type: Right-angle Auxiliary Positioner Material: Engineering Plastics Size: Approx. 4 inches Weight: Approx. 540g Purpose: Woodworking positioning at right angles, fixed angle ruler Specifications: Size: 4in Length: 100mm / 3.9in Width: 100mm / 3.9in Height: 20mm / 0.8in Thickness: 15mm / 0.6in