Improves the visibility of the laser line or point; Special reflective target film increases 1.3 times the visibility of a green laser line or dot when working over long distances or bright sunlight conditions. Inch and cm graduations: Easy-to-read scale with center zero in inches and cm.Attach it in multiple ways: magnets for convenient attachment to metal studs, hole diameter for hook, rear bracket unfolds to stay upright and stable on the floor. Positioning hole designed for comfortable grip.Suitable for alignment, laser level, cross lasers, rotary lasers, laser measurement and all green beam laser levels. Note: Data is all measured manually, please allow 1-3cm error, due to the difference in light and display, there will be a certain color difference, the actual object received shall prevail.