10 Pieces 90 Degree Right Angle Auxiliary Positioner Engineering Plastics Square Angle Ruler Holder Woodworking Tool Durable Positioning Squares for Woodworking Product features. The right angle auxiliary locator is a right angle positioning for carpenters and a fixed angle ruler. Right angle tools can easily take vertical measurements at any time. Product size. Length (mm/in) Width (mm/in) Height (mm/in) Thickness (mm/in) of Right Angle Auxiliary Positioner 4 inch 100/3.9 100/3.9 20/0.8 15/0 ,6. Strong and Robust. The right angle auxiliary positioner is made of durable engineering plastics, with high hardness, anti-fall, sturdy and durable, and easy to carry. Product scale. There are 45 degree and 22.5 degree graduations on the right angle positioning ruler, which is convenient for angle measurement. Easy to use. The right angle auxiliary locator has a clear scale, durability and wear resistance, and can quickly measure and read data.