M18, Cordless 1/2" Hammer Drill Driver Kit, 4 Pole Frameless Motor Delivers 450 INLB Of Peak Torque, 0-450/1-1,700 RPM & 29,000 BPM, Compact & Ergonomic Design 8-1/2" Length, Digital Power Management Overload Protection Prevents Damage To The Tool & Battery In Abusive Situations, All Metal Gear Case, All Metal 1/2" Single Sleeve Ratcheting Chuck Provides Maximum Durability & Bit Retention, Includes 2 Compact Lithium-Ion Batteries, 1 Hour Charger & Kit Box.