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* Strong magnetic,can suck the screws easily when used it. * Exquisite workmanship, each edge can be accurately locked screws, no damage to the screw, and the screwdriver head. * Great replacement for missing, bent or broken flat head screwdriver bits. * Made of S2 alloy steel, which is a commonly used material in hardware with high hardness. * Those bits fit for electric screwdrivers, hand screwdrivers, electric drills, air drills and so forth. Specifications: Shank Size: (Hex) 1/4-inch Bit Type: SL4 Tip Width: 4mm / 0.16" Total Length: 75mm / 3-inch Surface Treatment: Sandblasting Material: S2 Package Content: 10 x Slotted Screwdriver Bits