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Helps accurately establish a crater or dimple that is used as a guide to center a drill bit. |
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Gold-plated brass base holds an 8X optical lens that is used to locate position to be center-punched. |
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Optical center lens is then removed and replaced with an A-2 hardened steel punch used to center punch workpiece. |
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High-friction O-ring mounted on the bottom of base prevents movement of base while locating and center-punching workpiece. |