DEWALT¨ 20V Max* Lithium Ion batteries offer longer tool runtime & enhanced durability. 3-speed all-metal transmission matches the tool to task for fastest application speed and improved run time. Heavy-duty 1/2" metal ratcheting chuck with carbide inserts provides superior bit gripping strength. LED light with 20 second delay after trigger release. High power, high efficiency motor delivers 535 unit watts out of max power for superior performance in all drilling and fastening applications.