Thread Dia:M3 M4 M5 M6. Hex Wrench Various 1pcs: M1.5 M2 M2.5 M3. Screws Various 20pcs. -The product is smooth without burr, high quality and durable. -The product is made of grade 12.9 high-strength carbon steel, which has the characteristics of high toughness, good cold and hot workability and excellent machinability.
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