NAT81 Heavy Duty Aluminum Survey Tripod RL-H5A Accessory and a positive lock

and a positive lock

and square reference points

LCRED: Keson Red Hard Lumber Crayon (12/Box)

with its Laser Class 1 construction

this mason twine doesn't come apart when re-used

NAT81 Heavy Duty Aluminum Survey Tripod RL-H5A Accessory and a positive lockThe Northwest Instrument NAT81 Heavy Duty Aluminum Tripod is a high quality device that provides a stable base for optical and laser equipment. For versatility on the job site, this tripod's height is adjustable from 38 to 62 inches. Surveyors can easily adjust the tripod's telescopic legs to the optimal height required. Once the appropriate level is selected, simply lock the legs in place with the quick clamp locks. The NWI heavy duty aluminum tripod