1.Made of high quality stainless steel,corrosion resistant,strong and durable. 2.Includes 7 Most Used Sizes: M3,M4,M5,M6,M8,M10,M12. 3.Packed in a plastic box: organized by size in a transparent storage case for quick access and protection. 4.Twist the nut by hand without any other tools, easy to install. 5.Suitable for machinery and equipment, electronic equipment, communications equipment, hardware lighting, building bridges, furniture decoration, etc. Quantity: 100 pieces in total Note: It does not include other things, the color is based on the first picture, and the other pictures only show the effect Due to the differences between different monitors, the picture may not reflect the actual color of the item. Due to manual measurement. Please allow deviation. Thanks!