Proto, a stanley works group company, offers a broad range of professional torque products. A product line that ranges from easy-to-use micrometer, or "click" style torque wrenches, electronic torque wrenches, dial torque wrenches and torque screw. Drivers to full-featured electronic torque multipliers and torque testers. Each torque wrench is manufactured to precise specifications for maximum performance for your torque application. Proto was the first hand tool manufacturer to produce and market the combination wrench in the united states. Among the many styles of wrenches produced by proto are: standard, extra long and short combination, flex-head, open end, angle head, box, deep offset box, ratcheting box, obstruction, adjustable, flare nut, striking, slugging, construction, spanner and pipe. These proto wrenches incorporate a wide range of both fractional and metric wrench openings, along with satin, high polish, and proto black, black oxide finishes, designed to meet any industrial requirement.