To measure diameter of shallow and blind holes
Optional accessory: 0.01mm or 0.001mm graduation dia indicators, setting ring, long handle, bore gage setter
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3M 26135, PPS Series 2.0 Adapter, Type S40, Trapezoidal Thread, 7100135335
3M 06512, Scotch Steel Gray Masking Paper, 06512, 12 in x 1000 ft, 3 per case, 7010327747 