Hitachi DV18DSDL 18-Volt Lithium Ion Hammer Drill (3.0Ah) Covered by Hitachi's Lifetime Lithium Ion tool warranty and 2-year Lithium Ion battery warranty Powered by Lithium Ion slide-type battery technology for fade free power, less weight and 3x the total battery life of traditional batteries Industrial grade 2-piece motor with up to 814 in-lbs of torque to handle the toughest jobs Single sleeve ratcheting 1/2" metal keyless chuck with carbide jaw inserts for maximum bit grip and convenient swap-outs 22-position clutch with drill and hammer drill modes for properly matching the torque to the application Aluminum gear case for maximum durability and strength Metal belt hook keeps the tool close at hand Bright LED light for increased visibility in enclosed work spaces Externally accessible carbon brush for quick and easy maintenance Lightweight at only 4.8 lbs