Born from superior engineering and next-generation battery technology. 

The result is a rotary hammer drill that boasts outstanding performance and lives up to the legendary Cat reputation for quality and durability. Made specifically to be the professional user’s rotary hammer drill, with the power and functionality to handle a wide variety of rotary hammer drill applications, and the rugged construction to take on tougher jobs. The Cat Cordless Rotary Hammer Drill was built with a high-efficiency brushless motor that provides 25% more power, 50% more run time and 10% longer life than comparable rotary hammer drills with brushed motors. And it runs on the revolutionary 18V 1 FOR ALL battery platform which features cutting-edge advancements in battery tech for more performance and run time. This model comes with two 4.0Ah lithium-ion batteries and a 4A charger. Not only do those batteries power this tool but they’re interchangeable with every other tool in the 1 FOR ALL family, saving you time and money in the long run. Innovative ergonomic design makes this rotary hammer drill easier on the user, too, even for extended periods during the toughest applications. Cat Tools are made for the pros, with advanced features and capabilities that add up to higher productivity and extended run times, with less operator fatigue and reduced downtime. Let’s Do The Work.

Key Features

HIGH-EFFICIENCY BRUSHLESS MOTOR Delivers 25% more power, 50% more run time, and 10% longer life

1 FOR ALL CAT Li-Ion and Graphene batteries deliver protection and peak performance to get more done per charge

2.2 JOULES (1.6 FT-LBS) OF IMPACT ENERGY Delivers corded power without the cord

5 FUNCTIONS Drill, Hammer Drill, Chisel, Bit Rotation and Impulse tile drilling

ANTI-VIBRATION To reduce user fatigue

SDS-PLUS CHUCK For chipping or drilling into masonry or concrete

ONE BATTERY Cat 18V Cordless Power Tools use the interchangeable, rechargeable 1 For All battery platform to deliver improved run times and performance over competing products.

Product Specifications

• Power Source Battery: Powered
• Maximum Rotational Speed: 2500 RPM
• Voltage: 18 Volts
• Amperage: 4 Amps
• Maximum Chuck Size: 1 Inches
• Additional Features: Cordless
• Maximum Torque: 12 Newton Meters
• Speed: 1100 RPM
• Maximum Power: 500 Watts
• Torque: 12 Newton Meters
• Drill Type: Hammer Drill
• Battery Capacity: 4 Amp Hours
• Is Electric: Yes
• Drilling Capacity Wood: 1 Inches
• Drilling Capacity Metal: 1 Inches
• Brand Name: CAT
• Included Components: (1) SDS-Plus Rotary Hammer Drill (DX21B), auxiliary handle, depth gauge rod, slide lock kit box, (2) 18V 4.0Ah batteries, 4A charger (DXC4)
• Model Number: DX21
• UPC: 845534024869
• Manufacturer: Caterpillar
• Manufacturer Part Number: DX21