Cordless 12V 1/2 Hammer Drill/Driver (Bare Tool). 1/2 all-metal chuck with carbide teeth for maximum durability, grip and bit retention. Mechanical Clutch for consistency in driving a wide range of fasteners. Unmatched Performance with the most runtime in class with the 5.0Ah batteries. Hammer Drill Mode for Fast Drilling into Brick, Block or Concrete. All-metal belt clip for portability. Milwaukee 2904-20 12V 1/2 Hammer Drill/ Driver (Bare Tool). The Milwaukee 1/2 Hammer Drill Driver is a powerful Hammer Drill, delivering the capability to drill the largest holes at high speed into the densest materials. Brushless motor delivers the power under load to complete 2-9/16 Self-Feed holes in dense woods for increased productivity. The all metal ratcheting chuck is the best-in-class. This provides increased grip strength, durability, and corrosion resistance. 1/2 all-metal chuck with carbide teeth for maximum durability, grip and bit retentionMechanical Clutch for consistency in driving a wide range of fastenersUnmatched Performance with the most runtime in class with the 5.0Ah batteriesHammer Drill Mode for Fast Drilling into Brick, Block or ConcreteAll-metal belt clip for portability. (1) Milwaukee 2904-20 1/2 Hammer Drill/ Driver (Bare Tool). 9.0 "h x 11.0 "h x 4.0 h. 11"L x 9"W x 4H.