Elevate your performance tuning with the PROFORM Calibrated Spring, designed for precision and reliability in your automotive projects. Precision Calibration: Ensures accurate measurements for optimal performance tuning. Durable Construction: Built to withstand the rigors of automotive applications, ensuring long-lasting reliability. Lightweight Design: Weighing just 0.430 lbs, it’s easy to handle and transport, making it ideal for both shop and field use. Versatile Use: Perfect for various automotive applications, enhancing your toolset for tuning and adjustments. The PROFORM BB1901 Calibrated Spring is a must-have for any serious mechanic or enthusiast looking to improve vehicle performance with precision.Invest in quality and accuracy with PROFORM's trusted tools.