Built-in internal spring for long term resilience, can withstand repeated pressure and maintain stability over long term use Ideal for professional environments such as construction sites, road surveillance and interior projects to easily accommodate a variety of measuring needs Maintaining a solid connection of the rod ensures stable and accurate readings and eliminates data errors caused by loosening installation in critical survey work It features an innovative design that allows for tool-free installation and removal to save time and effort when setting up and adjusting your measurements Designed for both round leveling rods, these durable clips are universal fit for a variety of measuring tasks in construction and engineering projects, Manufacturer: Pffiocix