A lightweight and compact laser level tool that can generate two lines at a 90-degree angle on the floor, wall or other surfaces to help you square, align, and 90 Angle adjustment and moreDouble Bubble-Double level bubble and laser level can provide accurate alignment of plane or straight lineSimple one-key operation to open and close two vertical lines (90 degrees), Class IIIa laser product, maximum output: <5mWTwo suction cups allow the level to be installed on smooth surfaces (such as clean glass and tiles) for 90-degree layout calculations and alignment guides for rotation angles in 5 degree incrementsProject horizontal and vertical chalk lines on any surface up to 52 feet (16 meters). Provides precision and accuracy within 1 inch per 100 feet. Ideal for carpentry, stair starting boards, shelves, shelves, molding, tiles or any other work that requires precise alignment