Hexagonal wrench, long ball head

Note: Since the weight of the hexagon wrench varies greatly, if you place an order, please contact customer service to check the shipping fee! Material: No. 45 steel Heat treatment (hardened)!   The length of the product in different batches (width length mm * length mm) will have errors (because the total length of each cut will not be that, so there will be errors when bent 7 shapes). The diameter of the hexagon wrench is not a standard positive number mm (for example, 4mm does not quench the inner hexagon, and its actual diameter is about 3.7mm-3.95mm), and so on. The hexagon diameter of other specifications is.Because there are many types of screws in the market, if you need a standard 4mm, please contact customer service to answer you.