316 Stainless Steel. Sizes from 1/4-20 to 1/2-13, lengths from 1/2" to 2-1/2" . Includes nuts, flats and locks - 940 Pieces. We stock a wide variety of Fastener Assortments in both inch & metric, numerous finishes and fastener types. All KL Jack Drawer Assortments are packaged in Large Scoop Latching Metal Boxes with a Contents Label and easy to read Drawer ID Label. Assortment Drawer Outside Dimensions in Inches: 18" wide x 12" deep x 3" high.