The Precision Instruments Micrometer Click Wrenches feature a patented roller release mechanism; patented plunger roller bearings and a patent-pending lock ring, and high-grade alloy springs. The click wrenches are accurate to 3 percent of the settings from 20 percent of full scale to full scale in both the clockwise and counterclockwise directions. Engineered, precision bearing surfaces extend the calibrated life of the M line to as many as 60,000 cycles or more. Calibration is completely external, unlike traditional mechanisms that require disassembly and the replacement of blocks and shims.
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