PREMIUM MATERIAL: 511 Pcs nuts assortment kit is made of premium 304 stainless steel, rust, corrosion and oxidation resistance MULTIPLE SIZES: 12 SAE sizes hex nuts: 2#56, 4#40, 6#32, 8#32, 10#24, 10#32, 12#24, 1/4-20, 5/16-18 3/8-16, 7/16-14, 1/2-13; 9 Metric sizes hex nuts: M2, M2.5, M3, M4, M5, M6, M8, M10, M12 WIDE APPLICATION: Suitable for a wide range of applications such as furniture decoration, DIY,automotive repair, building, door handles, medical equipment, small repairsaround shops and so on HANDY PACKING: All hex nuts are well packed in a double sided storage box with thickened latch and dividers, handy and neat, easy to install and access. 1 pc pick tool including CUSTOMER SERVICE: We are confident that you will have a great experience with Busy-Corner SAE & Metric Hex Nut Assortment kit. if you have any problem, please feel free to contact us Hex Nut Assortment Kit