The Milwaukee M18 CHPX FUEL™ High Performance SDS Plus Hammer has 4 modes of operation: Rotary Hammer, Hammer Only, Rotation Only and Variolock for maximum versatility. It is the hardest hitting cordless SDS hammer in its class. The powerful hammer mechanism delivers 4.3 joules of impact energy at low 8.6 m/s² vibrations thanks to the new dual rail anti-vibration system. It is fitted with a brushless POWERSTATE™ motor with an all metal gear case for optimum seating of the gears and for enhanced service life. There is also keyless chuck changing, thanks to the FIXTEC system. REDLINK PLUS™ intelligence system delivers the most advanced digital overload protection for tool and battery and uniquely enhances the tool performance under load. Individual battery cell monitoring optimises tool run time and ensures long term pack durability. Compatible with the M18-28 CPDEX Dust Extractor. Bare Unit - No Battery or Charger supplied. Specification Modes: Rotary Hammer, Hammer Only, Rotation Only and Variolock.No Load Speed: 0-1,350/min.Impact Rate: 0-5,000/bpm with 4.3 joules.Capacity: Steel 13mm, Wood 30mm, Concrete 28mmWeight: 4.3kg.