The most important criteria should be that the drill rests snugly and in an upright position to give 90-degree drilling.
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| Simple lever handle move the drill up-and-down during drilling |
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| Ensure the drill bit is at 90-degree angle before drilling |
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| Elastic rubber strap holds the drill at a comfortable height |
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| Anther piece of elastic strap holds the drill in place during drilling |
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| Back-view. The two door railings are screwed to wooden uprights |
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| Bottom-view. Drill is mounted into a hole cut exactly to fit the drill chuck |
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| Top-view- The drill is hold in place by an elastic strap |
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