The Milwaukee Tool M18 FUEL STRIKER Hammer Chisel, No. 3771-20, is built to deliver full pneumatic striking performance without the need for a compressor or air hose. Powered by a POWERSTATE Brushless Motor, this solution generates 7 joules of striking force. A twist-style chuck supports quick and easy bit changes while remaining fully compatible with all .401" round shank accessories, allowing users to move seamlessly between applications. A variable speed trigger paired with three selectable modes gives users precise control over striking output, including a ramp-up mode that gradually increases impact speed from 0 to 3,000 bpm when the trigger is fully engaged.