TPI heavy-duty tripod features a head which easily holds GPS receivers, lasers or robots. It’s larger telescoping legs feature adjustable handle bolts on the leg pivots which creates greater stability. The tripod features a collapsible center staff with twist locking mechanism that rotates 360 degrees to check calibration of plumbing with a 10 minute vial, and quick release mechanisms on the legs. And, no tools are needed to set the leg pivot tension! Precise adjusters to make centering the 10-minute vial easier. It is graduated and adjusts to three heights: 2 m, 1.8 m, and 1.5 m. and also features an onboard compass and removable 5/8 x 11 adapter. The adjusters provide fine leg extension, a range of ± 0.25-inch from the center line.  It’s like having leveling screws for a tripod! Dual points create more bite in the ground and minimize the chance for twisting. Double points are useful with angle measuring instruments such as robots. Carrying bag included.