Description:* These Screwdriver Bits are with magnetic design.* This useful hex screwdriver bit, 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 square 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.Specification:Shank Size: (Hex) 1/4-inchBit Dia: 2.8mm/0.11-inchTotal Length: 50mm / 2-inchBit Type: SQ2 (2.8mm)Surface Treatment: Sandblasting;Material: S2Package Content:5 x Square Screwdriver Bits.