HFT FT target hole size checker
thingiverse
A precise little tool to measure the diameter on a knockover target, ranging from 15mm to 45mm in increments of 5mm. These are designed (or should be) 0.5mm smaller than actual to accommodate the thickness of paint around the hole on the target. Simply print both parts and attach the ring handle to the base of the gauge. Mine fitted perfectly, so no glue was required.
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