1、Made of high quality 304 stainless steel, rust and corrosion resistant, widely used in industry. 2、This set is organized by size in a transparent storage case for quick access and protection. 3、There are 6 different sizes in one set to meet your various needs. 4、Ideal for use by a variety of workers and repairmen from plumbers to assemblymen both professional and amateur. 5、Similar to countersunk head screws, the nail head is embedded in the machine parts. Generally used in various machine tools and accessories. Features: Made of high quality 304 stainless steel, rust and corrosion resistant, widely used in industry. This set is organized by size in a transparent storage case for quick access and protection. There are 6 different sizes in one set to meet your various needs. Ideal for use by a variety of workers and repairmen from plumbers to assemblymen both professional and amateur. Similar to countersunk head screws, the nail head is embedded in the machine parts. Generally used in various machine tools and accessories. Specification: Material: 304 stainless steel Weight: 327g/11.5oz Size & Quantity: #10-32*5/16  20pcs #10-32*1/4   20pcs #10-32*5/8   10pcs #10-32*3/8   20pcs #10-32*3/4   10pcs #10-32*1/2   10pcs #10-32 Nut  50pcs Package List: 20 x #10-32*5/16 20 x #10-32*1/4 10 x #10-32*5/8 20 x #10-32*3/8 10 x #10-32*3/4 10 x #10-32*1/2 50 x #10-32 Nut