Features: Stand up by itself, using for measuring the length, height and thickness. Checking the angle of the for triangle ruler is quick and easy. The ruler is clear, accurate and easy to read. The large center hole design would fit for your finger to hold or fasten this ruler on workpieces, easy and comfortable to place, handle or move around and wonfor t damage fragile cutting edges. This 45 degree aluminum alloy angle ruler is designed to clamp boxes, photo frames, etc, to assist with square making process. A must-have tool for hobbyists, home builders, carpenters, engineers, and hobbyists. Specifications: Material: ABS Size: As Shown Color: Red Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Carpenter Layout Tool