10pcs 65mm hex long black ph2 screwdriver bit

10pcs 65mm hex long black ph2 screwdriver bit Why do we only produce S2 TAIWAN bits? Bits are consumables, with poor quality and low lifespan, which cannot meet people's needs. Please see the material comparison: TAIWAN S2 material: The hardness can reach 58-60HRC, and the material is stable, high strength, and good wear resistance. Common S2 material: Poor material stability, hard to control hardness, easy to wear CR-V material: The hardness can only reach about 53HRC, which cannot meet the needs of customers. A good bit should use S2 TAIWAN material, and the hardness of the bit is controlled by heat treatment, not the harder, the more durable. If the hardness is too high, it is easy to break the ends, and if the hardness is too low, it is easy to slip and deform. Size:6.35*65/100/150/200mm HRC:60+-1HRC FINISH:Mirror, Bronze, Matt, phosphated black,Customise HEAD:PH,SL,TORX,SQ,PZ Function:fasten or loosen screws Ret…