Wright 1/2 Drive Ratchet Head 50-250 FT-LBS Micro-Adjustable Torque Wrench 4478The Wright Tool 4478 1/2" Drive Torque wrench is a micro-adjustable "click type" metal handle torque wrench. Made to use with hand sockets. It is accurate; ± 4% clockwise; ± 6% counterclockwise @ 20% of the scale. It is easy to operate; rugged; and durable.FEATURES:Patented Wright Drive distributes contact over a larger surface area for greater gripping power and strength.Forged and Machined for Best Fit and Unyielding Strength.Precision heat-treated and tempered for optimal hardness; ductility and durability.Push button socket “quick release” mechanism.English scales primary and metric secondary.Distinct breaking action when the set torque is reached.Breaking action and clicking noise is greatest at the upper part of the scale.Comes in fitted blow mold plastic storage box.Includes a Certificate of Calibration.Made in the USA. Designed; engineered and manufactured in Barberton; OH.Meets and exceeds ASME B107 hand tool standards.SPECIFICATIONS:Drive Size1/2"Length24.4"Torque Range50-250 ft. lb.Torque Range Metric47-332 NmTypeClickHead StyleRatchetIncrements (ft. lb.)1Increments (Nm)1.5MaterialForged Alloy SteelFinishChromeHead TypeRoundLocking TypeBallAccuracy±4% Both Ways" Wright 1/2" Drive Ratchet Head 50-250 FT-LBS Micro-Adjustable Torque Wrench 4478