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ISO 80 mm Two-Hole Binder Drill Guide
A drill guide for punching stacks too thick for a desk punch, like reports, manuals and 200-sheet piles. It drills ISO 838 binder holes with a 6 mm bit: two 6.4 mm guide bores, 80 mm apart and 12 mm in from the paper edge, each 12 mm deep to keep the bit square. The 120 x 37 mm block hooks over the stack edge with a 10 mm fence. A V-notch and a sight line mark the centre so you can line it up with a mid-page pencil mark.
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