Bubble levels; Carpenter's levels; Carpenters' rules; Distance measuring apparatus; Electric or electronic sensors for hidden objects behind walls during construction and renovation, in the nature of columns, electric wires and currents, pipes and the like; for use in detecting explosives in boxes and containers; for detecting liquid or gas leaks in structures; and for detecting levels and angularity in structures; Folding rulers; Graduated rulers; Hand-held device comprised of chemical and heat sensors for the detection of explosives; Instruments for measuring length; Laser device for projecting a visible line on a work piece to be cut by a rotary power saw; Laser measuring systems; Laser rangefinders; Laser scanners for industrial inspection; Laser-beam-emitting device which projects right angles for construction purposes; Lasers for measuring purposes; Lasers not for medical use; Level gauges; Level indicators; Level indicators; Lidar; Magnetic wall stud finders; Measuring rules; Measuring tapes; Non-electric wall stud finders; Plumb levels; Protractors; Sensors for the determination of temperatures, positions and distances; Spirit levels; Tape measures; Tape rulers; Ultrasonic sensors