Feature: 1. A laser line can be emitted on the surface of the object. The line can be at any angle, and can be operated at a 90‑degree angle with single or double lines. 2. Suitable for carpentry, stair starters, shelves, molding, tiling or any other work that requires precise alignment 3. Double bubble level for precise flat or straight alignment 4. With ON / OFF switch, two suction cups, specially designed for craftsmen 5. Maintains the characteristics of the original square, and simultaneously outputs two extended 90° right‑angle laser lines, which can significantly extend the length of the L‑square 6. The angle of the marking line can be changed according to the measuring angle scale, which saves the time of measuring angle and scribing Specification: Item Type: Laser Line LevelLaser Wavelength: 650nm Laser Level: Level 3 Protection Level: IP54 Accuracy: ±3/8 inch Self-levelling Range: ± 4° Battery: 1.5V AA x 3(not included) Uses: Angle measurement, draw right angle Product Size: Approx. 13.4 x 13.4 x 4.5cm / 5.3 x 5.3 x 1.8in. Package List: 1 x Laser Ruler