• High-quality stainless steel material offering high strength and good corrosion resistance in various environments. • Smooth, sharp, and burr-free thread that allows for a perfect fit with the nut without deformations. • The kit includes 440 pieces: 220 M4 nuts and 220 screws in lengths from 6 mm to 40 mm (20 pieces per size). • Supplied in a clear, sturdy storage box for quick access, organization, and protection of components. • Ideal for applications in electronics, appliances, mechanical equipment, furniture, industrial maintenance, and home repairs. • The set is complete with 2 wrenches to facilitate the assembly of hexagonal head screws.