M12 FUEL 1/4″ Hex 2-Speed Screwdriver. The M12 FUEL 1/4″ Hex 2-speed Screwdriver delivers longer productivity in a compact size. This 2-speed screwdriver provides up to 10X longer motor life, 2X more power, and 2X more runtime. The POWERSTATE Brushless Motor outperforms all leading competitors with constant power output, yet runs cooler with no wearable components. The REDLITHIUM 2.0 Compact Battery Pack (sold separately) delivers up to 20% more power and 2X more recharges than standard lithium-ion batteries, as well as best-in-class performance in extreme jobsite conditions. The onboard fuel gauge helps you monitor the charge more accurately, so there?s less downtime on the job. REDLINK PLUS? intelligence ensures maximum performance and protection from overload, overheating and over-discharge. The M12 FUEL 1/4″ Hex 2-speed Screwdriver’s optimized design results in superior speed for greater productivity on the jobsite. Its compact size allows users to work in tight spaces. The built-in LED worklight illuminates work surfaces in dark work spots.