Half Inch Jig
thingiverse
This drill jig is specifically engineered for efficiently creating half-inch holes. Measuring four inches wide, it's perfect for precision work on two-by-fours and four-by-fours. Although it fits a little snugly, this isn't an issue due to its secure design. The holes are precisely 9/16 inch in diameter, optimized to accommodate the bit I was using at the time.
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