Draper 78639 Torque Wrench (1/4\" Sq. Dr.) The Draper 78639 is an easy to use torque wrench with 1/4\" square drive. It features click type operation and micrometer adjustment which allows the user to apply the exact torque required. The torque value range is 5 - 25Nm. Features: Easy to use torque wrench The click-type operation and micrometer adjustment allow the user to apply the correct torque when required Clockwise right-hand thread torque application only Supplied in a blow mould case Specification: Torque value range: 5-25Nm Drive: 1/4\" square