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Title: Great for working alone.
Review: For $20.00, it was definitely worth it. There is a little weirdness though. The exposure is not exactly 4". It averages around 3 3/4" to 3 7/8". It seems to work best on 12 foot boards. When you press down to nail the board, the exposure seems to get the closest to 4". On shorter runs, I used only one gauge to hold up one end while I nailed the other end.
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