VARIETY OF MACHINE SCREW & NUT SIZES: Our Machine Screw Assortment Kit with Nuts includes machine screws & hexagon head nuts coming in a variety of sizes to fulfill all basic construction needs. The variety of sizes create options to find the perfect fit. ORGANIZED & FUNCTIONAL: Each set features 8 compartments, 1 for each size included in the set. We created separate compartments for each item to allow maximum organization and to assist in not losing or mixing the machine screws and hexagon head nuts. EXTRA STRENGTH & DURABLE: We believe in only the highest quality products for our customers. Our machine screws and hexagon head nuts are extremely durable if installed properly allowing for any construction project to be completed without worry.