Brushless motor 3/8″ Square drive for quick socket changes 2 stage imapct power selection Variable speed control by trigger Reverse rotation auto-stop mode; This mode works only by pulling the trigger in counter-clockwise rotation. When the bolt/nut is loosened enough, the tool stops the impact and rotation in 0.2 seconds Built in LED job light to illuminate the work area Standard bolt m8 to m16 High tensile bolt m6 to m12 Maximum fastening torque 160 Nm Nut busting torque 290 Nm, Weight: 1.75 Pounds, Manufacturer: Makita