| 摘要 |
A tool adapted for use with a drill for installing screw anchors in concrete or masonry walls or the like having a sleeve type body, a bit holder slidably located in the body, a drill bit with a handle secured in the bit holder, a coil spring seated on a collar of a bit holder and extending around the bit, a set screw to retain the drill bit in the bit holder and also to serve as a means to advance and retract the drill bit, a cutout comprised of a longitudinal slot, a retainer notch, and at least one depth notch, and a driver seat capable of retaining a driver bit and further capable of releasable attachment to the sleeve type body. The attachment cap allows ready conversion of the tool from a drill to a driver and back again.
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