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Measuring & Layout

Outside Calipers outline drawing

Outside Calipers

CategoryMeasuring & Layout

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Two bowed legs hinged at the top, with tips that curve inward to measure the outside of round stock or the thickness of a board. Set to the work, then read with a rule. Used to check stock size and turning diameters.

Buying tip
Measures outside diameters and stock thickness. Mostly used at the lathe.

Heads-up  Shop or bench tool — most site carpenters never carry one.

Which trades carry it

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