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Helpful Measuring Tools: Calipers, Micrometers, Tapes

Host David Thiel reveals several tools to help get those all-important measurements right.

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sliding square works like combination square
Photo 1 of 6A sliding square works like a combination square, but it has a broad surface that aligns with the edge of the board; this ensures a straight line. The sliding square has two scales so you can mark out an intersection.

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