Stanley J000N Proto 22 Blade Step Cut Feeler Gauge Set -inch Go/no-go-inch 1/2-inch x 3-5/16-inch blades in steel holder. Each blade has two different thicknesses. Sizes: .004/.006-inch, .005/.007-inch, .006/.008-inch, .007/.009-inch, .008/.010, .009/.011-inch, .010/.012-inch, .011/.013-inch, .012/.014-inch, .013/.015-inch, .014/.016-inch, .015/.017-inch, .016/.018-inch, .017/.019-inch, .018/.020-inch, .019/.021-inch, .020/.022-inch, .021/.023-inch, .022/.024-inch, .023/.025-inch, .024/.026-inch, .025/.027-inch. Blades etched with both decimal size and metric equivalent.