Enhanced Work Efficiency: The Laser Target Ruler is designed to boost productivity and minimize errors, ensuring precise level every time. Robust Magnetic Base with Level: Equipped with a strong magnetic base and convenient , this ruler can be positioned quickly and accurately. Aluminum Alloy Construction: Made with a thickened aluminum alloy, the ruler is drop-, wear-, and for easy portability. Double-Sided High-Precision Scale: Featuring a high-definition, double-sided scale, allows for quick accurate measurements and level finds. Versatile Tool Compatibility: Suitable for alignment laser level, crosshair laser, rotary laser, laser measurement. perfect floor and ceiling installation. Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Colour:Black Material:Aluminum alloy Package Contents: 6x Tile Height Ruler Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.