M18 fuel, 18v, 1/4″, lithium-ion brushless cordless hex impact driver, compact 4.59″l, more access in tight spaces, up to 25% more torque, up to 2,000 lb to complete more demanding applications, 4 mode drive control provides greater control over output speed & power, self-tapping screw mode provides faster installation time by reducing the stripping of fasteners, 1 handed bit insertion for faster, easier changing of bits, led light to illuminate the work area, premium rubber over mold withstands corrosive materials & provides increased comfort when in use, power state brushless motor delivers up to 30% faster driving speed, increasing users productivity, red-link plus intelligence ensures optimal performance & provides overload protection to prevent damage to the tool & battery during heavy applications while still maintaining compatibility, 2.0 ah battery pack delivers more work per charge.