The new Bosch CLPK237-181 18-Volt combo kit with HDS181 Compact Tough 1/2-Inch Hammer Drill/Driver and 25618 1/4-Inch Hex Impact Driver are compact and lightweight for better balance and control. The HDS181 features a 4-pole open frame motor that gives you more power in a smaller size. The Durashield housing lets the HDS181 withstand the toughest jobsite conditions. Variable speed trigger and soft-grip wrapped housing provides maximum control while fitting comfortably in your hand. The Bosch 25618 18-Volt impactor driver features a lightweight design for increased maneuverability in tight spaces and extended comfort. Boasting a high-performance motor and all-metal gears, this versatile tool is rugged enough for professional jobs and user-friendly enough for weekend workers. Bit changes are easy with the 1/4-Inch hex drive, and a built-in LED provides extra light when needed. Electronic Cell Protection results in longer battery life and better performance. The Bosch CLPK237-181 Combo Kit Includes: (1) HDS181 Compact Tough 1/2-Inch Hammer Drill/Driver, (1) 25618 1/4-Inch Hex Impact Driver, (2) 4.0 Ah Lithium-Ion Batteries, (1) Battery Charger and (1) Carrying Case.