Bosch PLL360 Laser Level Self-leveling, 360 degree line laser for accurate alignment in an entire room. Adjustable height tripod. Perfectly leveled vertical line for even more applications. Precise, clearly visible lines with half a millimetre accuracy. Perfect for fitting boarders, tiling, and installing curtain rails, suspended ceilings, carpentry, flooring, hanging cabinets. This little tool has saved me hours on the job. The tripod has a slight defect. One of the holding screws is stripped so you have to balance the level on the tripod. It sounds harder than it really is, and it doesn't effect the accuracy. I have reduced the price because of this.