Measuring Keyhole Spacing: Why the Tool You Want Doesn't Exist
Daniel wants a measuring tool between a caliper and a laser range finder — something like a slider over a ruler that reports millimeters, for mounting plug strips in a rental with almost no outlets. The problem: he's describing two tools and trying to buy one. Digital tape measures are structurally wrong for point-to-point spans between keyhole slots, lasers can't see inside a slot and are too coarse at 1.5mm, and the closest digital slider on the market is a tape. The real find? A $27 self-inking keyhole marker that skips measurement entirely — you use the object as its own template. Key…
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