The Enerpac RSQ3000 is a 1" steel drive head which attaches to compatible RSL Drive Units to make a complete square drive hydraulic torque wrench. For heavy use and enduring durability, RSQ-Series Square Drive Heads (Cassettes) are constructed from robust steel and are easily fixed to the RSL Drive Unit using two Allen Key Bolts. The various sizes available give you the versatility to complete a wide range of bolting applications. A constant torque output provides accuracy of +/-3 percent across full stroke.