Features: Size: #8-32 screws in 7 different size which can meet your different needs. Material: 304 stainless steel material which have good corrosion resistance in bad environment like high temperature cold weather and high humidity areas. Thus the screw set can serve you for a long time. Package: 170 pieces in total packed in a durable transparent box. It is easy to distinguish the size of the product when you want to use a certain screw. Wide Applications: Widely used in all kinds of precision machinery industry classified instruments instruments electronic products printed projects household appliances communication products. Long Service Life: The installation parts can be used continuously bear strong load and have a long service life. Specifications: Material: 304 stainless steel Product Quantity: 170pcs Surface Treatment: Untreated Application: Widely used in mechanical field it is generally used for various machine tools and their accessories. includes: 20pcs*#8-32x1/4 20pcs*#8-32x5/16 20pcs*#8-32x3/8 20pcs*#8-32x1/2 20pcs*#8-32x5/8 10pcs*#8-32x3/4 60pcs*#8-32 "