First fully adjustable digital valve seat pressure tester for rocker length and offset. Precision 5.0LB increments Brass contact to prevent rocker damage Fully anodized billet aluminum components Comfort grip t-handle for improved accuracy and ease of use Extremely lightweight and easy to use Infinite adjustment and peak hold for hard to reach areas Backlit for night use, 9V battery operated Capacity range from 0-600LB Intercomp Quality