Key features and benefits Knurling ratchet device for constant force measurement Provides a stable, repeatable force during measurement, improving accuracy and consistency across all readings. Locking device to fix measurement size Secures the selected dimension and prevents clearance changes caused by surface errors, ensuring reliable repeatability. Userfriendly with 0.001 mm resolution Easy to set and read, allowing precise control of measurement increments for tight tolerances. alloy measurement surface Rustresistant and durable, delivering long service life and consistent performance in demanding environments. Applications and scenarios Precision metrology where a constant applied force improves measurement stability for small dimensions and tolerances. Quality control and fixture setup to lock in a measurement size and prevent drift during repeated checks. Educational, R&D, or workshop tasks requiring resolution measurements with a durable, reliable measurement surface.