The Bosch RHS181K 18-Volt Lithium Ion 1/2 in. SDS-plus Compact Rotary Hammer Kit features High performance motor for increased performance, longer lifetime, and higher stall torque. Currently if you purchase RHS181K you will receive an additional Free Bosch High Capacity 18-Volt Lithium-Ion Fat Pack Battery (BAT619G) (Online Only). Most Compact Size: Ideal for drilling in tight work areas. Lightest Weight: Ideal for drilling over head. 2 mode drive- Hammer drilling and screwing and drilling. This tool also includes a built-in LED light.