The GL422N automatic, self-leveling dual grade laser is the most rugged, cost-effective laser that does three jobs: level, grade and vertical alignment. Even in harsh jobsite conditions, it delivers consistently reliable and accurate performance, enabling you to work faster and smarter. The rugged laser can withstand drops of up to one meter onto concrete and tripod tip-overs up to 1.5 meters. This strength, combined with full weatherproofing and dustproofing, reduces downtime and lowers repair costs over the life of the product. Each GL422N laser system now includes the advanced HL760 Digital Readout (DRO) receiver that provides automatic Grade Match, PlaneLok, and Fingerprint function. Grade Match measures and displays the existing grade over unknown ground, eliminating time consuming, error-prone calculations. PlaneLok automatically locks on to an existing horizontal elevation or vertical alignment point, which eliminates all drift or possibility of error due to improper calibration or weather. The unique Fingerprint function only accepts the beam from the laser it is paired with. The CR600 receiver is also an option when a machine mounted display elevation is required.