Harbor Freight Tool's Quality Assurance headquarters in Calabasas, CA thoroughly and vigorously test Central Hydraulics tools. The Quality Assurance division of Harbor Freight is dedicated to quality control, product testing, development and constant improvement. Testing simulates extreme real-world conditions, reflecting how the customer will actually use the tools and how these tools hold up under rigorous use. Testing is performed throughout the production process and continues through post-production to both reduce the possibility of defects and to improve existing versions.