The DEWALT DW083K Self-Levelling Laser has 3 beams, accurate to±0.2mm/m. It has a self-levelling angle of up to 4° and the pointer can be rotated 180°. With a one button operation for fast and easy operation of the laser. The pendulum locks when in the \'off\' position and the focused laser beam keeps the laser dot small, even over long distances for improved accuracy and visibility. Location magnets allow the pointer to be used on metal track or with wall bracket. The industrial design allows pointer to be placed over track. It also has a 1/4in standard tripod connection. Ideal for metal track installation, curtain wall installation, floor to ceiling transfer, general levelling up to 25m distance, positioning overhead anchors, positioning plumb drilling locations for vertical pipe and positioning overhead lighting. Specification Laser Class: ;2, Level Accuracy: ±0.2 mm/m.Self-Levelling Range: 4°.Number of Beams: 3. ;Visibility Indoor: ;30 Metres.Power: ;4 ;x AA batteries (supplied).Thread: 1/4in.Size: ;55 ;x 135 ;x 100mm.Weight: 0.55kg.