13 Most Common Sizes Are Included In The Yeezet 652 Pcs. Grade 8.8 M4 M5 M6 ?HIGH QUALITY TO BE TRUSTWORTHY. 8.8 Grade Alloy Steel, corrosion resistance property, features good wear resistance, high hardness and high strength, can be used in extreme environments. ?MANY SPECIFICATION TO BE CHOSEN: M4*10mm,M4*16mm,M4*20mm,M4*25mm,M4*30mm,M5*16mm,M5*20mm,M5*25mm,M5*30mm,M6*16mm,M6*20mm,M6*30mm,M6*40mm,total 163 Set, Includes 13 Most Common Sizes. ? STANDARD SIZE(Tolerance:0.005mm): Uniform force, located in the center of the head with no offset, not easy to slip; Uniform pitch, obvious screw thread, no residual burrs, the set screw threads will be able to get a good grip. (Pitch Size: M4*0.7mm?M5*0.8mm?M6*1.0mm) ? PLASTIC HEAT SEAL PACKAGING: Practical and convenient of packing box, All of screws and nuts are packed in a durable and sturdy box, this box can be use for a storage box. ? THE WIDE APPLICATIONS: Used widely in the home and office appliance, communication equipments, furniture, car motorcycle repair and DIY design.