Simple-to-use spring tester can be used to inspect coil springs up to 7" in length and 2.5" in diameter, minimum I.D. 5/8". Provides the accurate tension readings necessary to match sets of springs. Height of test platform is adjusted by rotating platform on threaded column. A flat is milled on the column and stamped with 1/16" increments. One full revolution of the platform adjusts the height by 1/16". During compression testing an audible tone is emitted when arm is parallel to the test base indicating predetermined compression length is achieved. Maximum capacity of torque wrench that can be used is 150 ft. lbs. or equivalent.