Stanley J000R Proto 16 Blade Overhead Valve Feeler Gauge Set 1/2-inch wide bent gauges for setting overhead valves. Sizes: .009-inch, .010-inch, .011-inch, .014-inch, .015-inch, .016-inch, .017-inch, .018-inch, .019-inch, .020-inch, .021-inch, .023-inch, .024-inch .025-inch .026-inch, .027-inch. Blades are offset at a right angle to help protect hands from a hot manifold while setting an overhead value. Blades etched with both decimal size and metric equivalent.