[Widely used]: 15 most commonly used sizes, suitable for general laptop computer applications. [BOX SIZE]: Approximately 178 x 105 x 23 mm, designed for convenient and organized screw storage. [Screw material]: Alloy steel construction with anti-rust performance for long-term use. [Computer repair]: Ideal for laptop repair tasks, providing a variety of screws for easy maintenance. Category: Combination screws Head type: Round head Groove type: Phillips Function mode: Hand screw/screwdriver compatible Thread specifications: M2 x 3 (small), M2 x 3, M2 x 4, M2 x 6, M2 x 8, M2 x 10, M2.5 x 3, M2.5 x 4, M2.5 x 5, M2.5 x 6, M2.5 x 8, M2.5 x 10, M2.5 x 12, M3 x 3, M3 x 4 (30 pieces of each size) Thread tolerance: Standard Surface treatment: Black oxide Material: Alloy steel Color: Black Package Contents: 30 x M2x3 Screws (small) 30 x M2x3 Screws 30 x M2x4 Screws 30 x M2x6 Screws 30 x M2x8 Screws 30 x M2x10 Screws 30 x M2.5x3 Screws 30 x M2.5x4 Screws 30 x M2.5x5 Screws 30 x M2.5x6 Screws 30 x M2.5x8 Screws 30 x M2.5x10 Screws 30 x M2.5x12 Screws 30 x M3x3 Screws (Head size 7mm) 30 x M3x4 Screws Note: The package includes only the items listed above. Other products are not included. Lighting and display settings may cause slight variations in color between the image and the actual item. Measurement tolerances may vary by +/- 1-3 cm.