Stanley Proto’s enhanced torque screwdriver line includes more accurate versions of four existing tools and four additional torque screwdrivers designed for high accuracy. The company’s previous offering included four ¼-inch drive torque screwdrivers – an inch-ounce model and an inch-pound model with an accuracy range of +/- 6 percent of the torque reading, as well as a CERT version of each. Proto says that by re-engineering these with precision-machined internal components, it has improved accuracy to a precise +/- 4 percent of the indicated torque reading; this accuracy level is available in the clockwise direction from 20 percent to 100 percent of full scale.
The latest ¼-inch torque screwdrivers with +/-2 percent accuracy (in the clockwise direction from 20 percent to 100 percent of full scale) also include inch-ounce and inch-pound versions. Torque settings are changed via a metal lock ring allowing micrometer-style adjustments. Each torque screwdriver has a ¼-inch square drive tip and ships with a ¼-inch square to ¼-inch hex adapter for use with insert bits. It comes in a blow-molded plastic box for protection and easy storage.
