Precision Instruments PRE M3R250FX Micrometer Click Wrench, 1/2", 40–250 lb/ft

You'll Wear Out Long Before These Wrenches Do Fixed-Ratchet head style Patented Roller Release Mechanism increases reliability and accuracy by eliminating virtually all friction Patented Plunger Roller Bearings extend life and repeatability by reducing over 95% of the friction at the interface between the plunger and the case Patent Pending lock ring is simple to use and durable for environments where torque settings are frequently being changed High grade alloy springs maintains accuracy even after hundreds of thousands of cycles Accurate to 3% of the settings from 20% of full scale to full scale in both the clockwise and counterclockwise directions Premium Made With Care Machined, chromed and assembled to ship in American Made cases from Des Plaines IL USA since 1938 All-Steel Construction of Aerospace Quality Steel What a click torque wrench should be, no substitutions Packaged in a plastic case