A Bit is an exchangeable srew blade. Bits exsist in many different shapes. The best known are the PH (Phillips crosshead), PZ (Pozdrive- crosshead) and the TX- Bits (six round). You can use Bits for ratchet wrenches, electric screwdrivers, or torque wrenches. You place the bit in a bitholder, which is usually magnetic. A standart bitholder has a ¼“ admission, which fits a commercial Bit.
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