Simply put the valve on the spring tester and use in a vise or an arbor press. Precision tool for the professional & normal Users. Valve spring testers allow you to evaluate your valve springs with a high degree of accuracy.
66835 Universal Mini Valve Spring Tester for 0-300LB/5LB Increments Valve Spring
66835 Universal Mini Valve Spring Tester For 0-300LB/5LB Increments Valve Spring
66835 Universal Mini Valve Spring Tester for Increments Valve Spring 0-300LB 5LB