The M12 FUEL 2404-20 1/2 Hammer Drill/Drivers POWERSTATE Brushless Motor runs cool and quiet with no wearable components. REDLINK PLUS intelligence improves performance and protects from overheating and over-discharge. It can be used with the REDLITHIUM&trade 2.0 Compact Battery Pack and 4.0 Extended Capacity Battery Pack (not included), which delivers more work per charge over the life of the battery, even in extreme conditions. The M12 FUEL Hammer Drill/Driver onboard gauge helps you monitor the charge precisely, so there less downtime on the job, and a built-in LED Light illuminates the work surface. An all-metal ratcheting locking chuck provides maximum grip, bit retention and durability. A new contoured soft grip gives you ultimate comfort during prolonged use.