| 摘要 |
A drilling bit with the depth-limiting and angle-leading function for the carpenter's work, having a covering sleeve (with a driving shaft) and a bit holder for securing a bit. A limit ring and a screw socket (with female thread) are screwable to the covering sleeve (with the male thread) for adjusting the depth of the spot-faced hole in a workpiece (to be drilled) according to the actual operation requirement.
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