The Makita 18V LXT Sub-Compact Brushless 3/8" Square Drive Impact Wrench, No. XWT12RB, is designed to give users 12V handling with 18V performance, and is compatible with Makita's 18V lithium-ion cordless tool system. This impact wrench is ideal for working in tight spaces and for overhead applications. The reverse rotation auto-stop mode stops rotation and impact when the fastener is loosened adequately. The tool also features a variable speed trigger, two speed settings, built-in L.E.D. lights and a 3/8" square drive for quick socket changes.