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9.5 mm HSS Rolled Black Metric Twist Drill Bit
9.5mm HSS Rolled Black Metric Twist Drill Bit
Drill sizes should be considered "suggestions", not "rules". What material are you drilling? Oily woods (cocobolo, bocote, etc) when drilled will expand to fill the hole slightly, immediately after drilling, so you need a slightly larger hole, whereas a "plastic" or resin blank will hold the shape you cut, so the drill can be smaller diameter. If your tube slides in and out of the blank with minimal resistance (and you don't plan on painting the hole, in a resin), your hole is about the right size. In any event, one THOUSANDTH of an inch is not a meaningful difference, so the above measurements could be considered "identical" for our purposes. Hope this helps, Ed