FITMENT: Fits for Most Overhead Valve Engines With Valve Stems From 4.5 to 7.5mm and 5/16" to 3/8".New smaller size Fits for Toyota four cylinder and for Chrysler New World Engine applications. Works on automobiles, motorcycles, and boats. FEATURES: 1）Function-- Used to removes and installs Valve Keepers On the above model quickly and smoothly and without disassembling the cylinder head. .
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