High quality materials with clear calibration. Near the center of the location ruler, there are 45 degrees and 22.5 degrees to quickly measure the angle. Durable, clear scale, high hardness, not easy to rust, easy to repair, suitable for more working parts. Suitable for gluing and assembling boxes, drawers, picture frames, furniture, cabinets, etc. Easy to carry, easy to use and will not damage the edges. Suitable for wood, metal right angle and 90 degree welding, etc. Content: 4 type L 90 degree positioning squares. Specifications: Material: plastic. Color: orange, red. Dimensions: 10 x 10 x 2 cm. Features: 1. High quality material, the calibration is clear. Near the center of the positioning ruler there are 45 and 22.5 degrees for quick angle measurement. Strong and durable, thicker and wider, suitable for multiple rooms. 2. Make the perfect corners for your carpentry projects. 3. Raised graduation (in inches and millimeters) on the inner and outer edges of each set square. The elegant interior groove further improves the accuracy of the quadrant. 4. Ideal for gluing and armoring boxes, drawers, picture frames, furniture, cupboards, etc.