- Complete kit of 720 Allen M4 hex and flat head screws in different lengths - Material: premium steel alloy, high mechanical strength, durability, and toughness - Screws with precise threads, do not deform and provide secure fastening - Plastic storage box with individual compartments for each size - Wide compatibility: 3D printers, electronic equipment, computers, machinery, office equipment, and more - Easy to transport and keep organized, ideal for professionals and DIY enthusiasts - Efficient solution for assembly, repair, and maintenance projects