Length:50mm/75mm/100mm/150mm. 1/4 Hex Shank Slotted Screwdriver Bit Magnetic 50mm-150mm Impact Drill Driver. -Size：Slotted Screwdriver Bits：1.5mm/ 2.0mm/2.5mm/3mm/4mm/4.5mm/5mm/6mm. Screwdriver Bits are made of S2 alloy steel which is a commonly used material in hardware with high hardness.
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