| 摘要 |
A laser-guided stair rail drill guide which may be mounted on a tentatively set stair rail to aid in the alignment for drilling of the bottom of the rail and marking the surface of the riser below, by use of a laser beam aligned with a longitudinal axis of a drill bit of a drill mounted in the guide. Using the guide of the invention allows for the holes in the bottom of the stair rail and the top of the riser below to be easily and precisely aligned, so that a baluster may be installed perfectly vertically therebetween.
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