Features: adopting stainless steel material, so it is durable to use. It is characterized by high hardness, corrosion-resistant and corrosion-resistant. technical data: material: Stainless steel size (10 PCS / type): M1 8, M1 12, M1 20, M1.5 10, M1.5 16, M1.5 25, M2 10, M2 20, M2 30, M2.5 12, M2.5 20, M2.5 30, M3 12, M3 20, M3 30.
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