Bosch Professional Optical Level set, which includes an optical level, a building tripod, and a telescopic leveling rod. Key features and components include:
Optical Level Models: GOL 20 D
Building Tripod: BT 160, used to stabilize the optical level.
Telescopic Leveling Rod: GR 500, used to measure height differences.
Brand: Manufactured by Robert Bosch PT.
Purpose: Used for precise leveling in construction and surveying.