300 pcs. M2 M2,5 M3 M4 M5 M6 Set of copper knurled nuts with internal thread Description: 300 PCS. Includes .5 M3 M4 M5 M6 knurled nuts with internal thread, for a total of 15 types to meet different needs. High quality copper material, durable, non-forming, rust resistant, non-slip, durable and long lasting. The set includes a clear assortment in a box for easy access. Widely used in forming, do fixing, can be installed in cone or hot or process. Widely used for professionals, amateurs, owners, mechanics, woodworking, construction, plumbing and so on. Specification: Material: copper Size Chart: Case size do storage: 195x130x36cm/76.77x51.18x14.17 inch The package includes: 300 pieces .5 M3 M4 M5 M6 Copper nuts with internal thread in box