| 摘要 |
A screwdriver of the type adapted to drive a slotted head screw and which is particularly adapted to firmly engage in a dull or deformed slot of such screw to drive the latter. This screwdriver includes a shank formed at one end with a head having a strikable end face and at the other end with a screw driving bit including a blade having a transverse outer edge, opposite side edges extending along the blade lengthwise of the shank, and protuberances on opposite sides of the blade at the opposite side edges thereof and extending lengthwise of the shank outwardly coextensive with the transverse edge to engage with the latter in a dull or deformed slot of a slotted head screw.
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