【Product details】---3 sizes of screws M2 M3 M4, thread pitch:0.4mm/0.5mm/0.7mmthread diameters:2mm/3mm/4mm.Lenths of the thread M2:4mm/6mm/8mm/10mm/12mm/16mm.M3:6mm/8mm/10mm/12mm/16mm/20mm.M4:6mm/8mm/10mm/12mm/16mm/20mmAccording with standardized metric system. And the average error is less than 0.01mm.

【Rust proof without oil】 These black zink plated finish screws are not oily, they will not dirty your hands or DIY items, and the rust proof performance is better than other oiled screws.

【Good storage and assortment】All These Screws are Packed In a Sturdy Easy-use Plastic Storage Box, Organized Conveniently and Easily.

【High quality】--- 25 Years of experience in fastener design and production.Made of high quality 12.9 grade alloy steel , which features is strength and offers good corrosion resistance in bad environment.

【Can be widely used】Keep a set of commonly uesd Kadrick screw sets on hand to make you convenient.