Up to 609 breakaway torque (406 Nm of fastening torque) ensures removal of the tightest bolts Ultra compact, light weight design allows for use in confined areas Square drive with hog ring allows quick socket changes DeWalt Impact Wrench Kit The DeWalt DCF921 XR Impact Wrench has an efficient brushless motor and 1/2" square drive with hog ring for quick socket changes. A hole in the anvil enables the securing of sockets with a retaining pin/rubber O-ring, making it the ideal impact wrench for scaffolders. Its variable speed trigger provides complete control over all applications and tactile 4-mode select feature, a selection of different modes and speed settings for ultimate performance. FEATURES Up to 609 breakaway torque (406 Nm of fastening torque) ensures removal of the tightest bolts Ultra compact, light weight design allows for use in confined areas Square drive with hog ring allows quick socket changes Hole in anvil allows securing of sockets with a retaining pin/rubber O-ring.