High Quality Materials: Manufactured from high quality alloy steel to provide strength.Making these bolts and nuts virtually indestructible and ensuring long life. M3 Sizes: M3 x 4-25pcs, M3 x 5-25pcs, M3 x 6-25pcs, M3 x 8-25pcs, M3 x 10-25pcs, M3 x 12-25pcs, M3 hex nuts - 50pcs, washers flat M3 - 50 pieces, spring washer M3 - 50 pieces. Quantity: 150 bolts with assorted nuts, washers and spring washers meet the various needs of people who represent the need for your privacy. Perfect for replacing broken and lost screws. Easy to Use: All screws and nuts will be packed in a plastic transparent box, easy to classify. Make your job easier and improve your working efficiency. Wide Application: Six common sizes and three optional types for general purpose widely used in all kinds of precision machinery, classified instruments, instruments, electronic products, household appliances, communication products, locks, lamps, lights, toys, etc. Product -Made of high quality alloy steel to ensure strength. Making these bolts and nuts virtually indestructible and ensuring a long service life. -Bolts -150 pieces with assorted nuts, washers and spring washers meet the diverse needs of people who represent the need of your life private. -Yeuri All screws and nuts will be packed in a plastic transparent box, easy to classify. Make your work easier and improve your working efficiency. -Socket head screw assortment kit is an ideal tool for home and workplace, woodworking, construction, plumbing, 3D printed projects, ship assembly, etc. Specifications: Material: Alloy Steel Color: Black Size: Hex Bolt Interface Diameter: 3mm (height - 4mm, 5mm, 6mm, 8mm, 10mm, 12mm) Hex Nuts Diameter: 3 mm Flat Washer Diameter: 3mm Spring Washer Diameter: 3 mm Package Includes: 25 Pieces M3x4 Hex Bolts 25 Pieces M3x5 Hex Bolts 25 Pieces M3x6 Hex Bolts 25 Pieces M3x8 Hex Bolts 25 Pieces M3x10 Hex Bolts 25 Pieces M3x12 Hex Bolts 50 Pieces M3 Nuts 50 Pieces M3 Washers 50 Pieces M3 Spring Washers