The Makita DHR281 Brushless LXT Rotary Hammer is powered by 2 x 18V Li-ion batteries in series (not supplied), to supply energy to the powerful 36V DC motor drive system. Supplied with a Quick Change Chuck for rotary-only drilling. It has a powerful brushless motor with a 'soft no load' function that automatically reduces the motor speed during idling to suppress the vibration of the machine body. The variable speed is controlled by a trigger and it offers 3 operating modes: rotary only, rotary hammer and hammer only. Anti-vibration technology decreases fatigue during use. There is also an electric brake for added safety and an LED job light. Comes as a Bare Unit, No Battery or Charger. Specification: Modes: Rotary drilling, Hammer drilling or Chiseling. No Load Speed: 0-980/min. Impact Rate: 0-5,000/bpm Impact Energy: 2.8 joules Capacity: Concrete 28mm, Concrete TCT Core 54mm, Concrete Diamond Core 65mm, Steel 13mm, Wood 32mm Weight: 4.0kg