XR BL 1/2in Impact Wrench 18V POWERSTACK Range - DEWALT DCF921H2T-GB, The DEWALT DCF921H2T XR BL 1/2in Impact Wrench has an efficient brushless motor and 1/2in 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. * Mode 1 Low Speed: tool operates at a reduced speed and outputs approximately 160Nm, reverse tool operates at normal speed.* Mode 2 Mid Speed: tool operates at a reduced speed and outputs approximately 400Nm, reverse tool operates at normal speed.* Mode 3 High Speed: tool operates at normal speed, reverse tool operates at normal speed.* Mode 4 Precision Wrench: tool pauses before impacting to help prevent over-tightening, reverse tool lowers speed when fast