| 摘要 |
A screw holding screwdriver bit capable of effectively preventing a come-out from occurring by improving the structure of the blade parts thereof, capable of being manufactured in a simple structure at a low cost, and capable of remarkably increasing a working efficiency by allowing an appropriate and rapid screw tightening operation at all times, and the combination thereof with screws, the driver bit comprising a plurality of blade parts (12) having generally vertical end edge parts (13) formed at the tip end parts (12a) thereof, wherein either of the blade parts (12) is cut out in the axial direction of the bit, a guide passage (16) of a specified length is provided in a shaft (11) portion continued generally on the extension of the cutout portion (15) of the blade part, and an elastic piece (18) allowed to elastically abut on a bit engagement groove in a screw head part and having a screw holding function by the interaction thereof with the blade part fitted into the bit engagement groove is inserted into the guide passage. |
