| 摘要 |
An attachment for drivers of screw type fasteners for releasably holding the fastener in place at the end thereof for inserting or removing. The attachment comprises a shaft collar, a spring, and a grasper, the grasper comprising an upper and a lower guide ferrule, joined concentrically by a pair of supports, and extending parallel from the lower ferrule a plurality of flexible fingers, each having at its distal end an inward facing detent that is substantially fulcrum shaped. The collar and spring are inserted between the ferrules, with the collar abutting the upper, the spring abutting the lower and the collar. A driver is inserted through the ferrules, collar, and spring until the tip is just shy of the detents, and the collar is then affixed to the driver shaft. A screw head is forced past the detents, the fingers yielding, and brought into proper contact with the driver tip, the fingers flexing back such that the detents hold the screw firmly to the driver.
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