Bovidix 0300225 1/2-Inch Drive Window Scale Torque Wrench Square size: 1/2 inch. Torque range: 50 - 350 Nm (37 - 258 lb. ft.) Calibrated. Accurate to +/-4-Percent of the set load Reversible with a switch and torque in both directions Reliable and durable lock Fast, accurate and easy to set. Has easy to read window scale and micrometer scale