| 摘要 |
PROBLEM TO BE SOLVED: To prevent a bit from being lost while attaining improvement of work efficiency by simplifying replacing work of the bit, in a bit joint applied for a power driver of driver drill, impact driver, etc., to be used in the case of connecting the fellow bits. SOLUTION: This bit joint is constituted by a main unit 2, insertion hole 3, extraction lock means 4, and an elastic hold means 5. Particularly in both sides in a lengthwise direction of the main unit 2, the insertion hole 3 inserting a bit A, extraction lock means 4 which can extraction lock the bit A inserted in the insertion hole 3 by providing an operating ring unit 6, and the elastic hold means 5 which can elastically hold the operating ring unit 6 of the extraction lock means 4 in an extraction lock position and an open position, are provided, so that so-called two bits A can be connected.
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