2. knurled locking screw for more convenient measurement and reading 1. Hardened stainless steel main scale and measuring jaws 3. Higher quality glass fixed grid, stable, and high accuracy 4. Quick display of the measured value on LCD screen, no over-speed error 5. With power button, automatic power off, waterproof IP54;6. Zero-setting at any position, mm/inch measurement system conversion, Manufacturer: Akfldms