Phillips Head Size: PH00, PH0, PH1, PH1, PH1, PH1, PH2, PH2, PH2, PH3Hex Shank Size: 1/4"Overall Length: 50mm / 2"Rod Diameter: 2.5mm / 0.1", 2.5mm / 0.1", 3mm / 0.12", 3.5mm / 0.14", 4mm / 0.16", 6mm / 0.24", 4mm / 0.16", 5mm / 0.2", 6mm / 0.24", 6mm / 0.24"Hardness: HRC59-61 (The recognized stable hardness is around HRC60.)10pcs Phillips Screwdriver Bits: 1pcs PH00 PH0 PH3 Size, 4pcs PH1 Size, 3pcs PH2 SizeThe screws for large household appliances are mainly PH2/PH3, those for small household appliances are mainly PH1, and those for precision instruments are mainly PH0/PH00. PH indicates the bluntness of the bit tip.
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