This is an assembly pack made up of the Makita BHR243 Brushless Rotary Hammer Drill and Makita DX01 Automatic Dust Extraction Unit. The DHR243 includes a Quick Change Chuck, able to drill in concrete as fast or faster than 24V Cordless Combination Hammer model BHR200. One touch slide chuck for SDS-plus bit. Easy-to-grip handle ergonomically designed to give maximum power thrust, and provide a sure and comfortable grip in any operation; overhead application, drilling with palm-up or palm-down grip. 3 mode operation: Rotation and Hammering Hammering only Rotation only The tool body is separated into the upper and lower housings at the foot of handle portion where the houses are jointed with vibration absorbing cushion rubbers. Higher productivity than model BHR202 achieved by using efficient Brushless DC motor to reduce energy loss by 30 percent. Unique rubber joint construction suppresses the transmission of vibration to battery terminals, minimizing battery failures such as terminal breakage or poor electrical contact. The Makita DX01 is designed to collect dust effectively with automatic operation from the tools on/off trigger switch. HEPA Filter: widely regarded as the ultimate filter that traps all sizes of particles with an efficiency rating of 99.75 percent. Large dust box cover can be opened by pushing a single button. Dust extraction inlet is adjustable according to the size of the drill bit length.