Lightweight, heavy-gauge aluminum design * Quick-Release Tripod - with two-section adjustable center column * Collet Locks - Provide firm, positive locking action * Main Elevator Column is Graduated in -centimeters/mm and Feet/Inch - To facilitate precise changes in elevation of instrument * 5/8-Inch-11 Thread Stud, Flat-Head, Elevator Tripod - Universal with string hook for plumb bob