Test valve spring tension up to 300 Ib. quickly and accurately, Lash wrenches are two-part steel tool makes it easy to accurately adjust your 9/16" or 5/8" rocker nuts, Feeler gauge consists of 22 blades. Measures from .004" to .025", Filter cutter is universal, works on filters 1-1/2" to 6-1/8" in diameter, Leakdown tester detects ring seat failure, bent valves, cracked head, and leaking gaskets.