Makita LXRH01ZVX 18-Volt LXT Lithium-Ion Brushless Cordless 1-Inch Rotary Hammer with HEPA Vacuum Attachment (Tool Only, No Battery) (Discontinued by Manufacturer) Efficient BL Brushless motor is electronically controlled to optimize battery energy use for up to 50-Degree longer run time per charge The BL Brushless Motor eliminates carbon brushes, enabling the BL Motor to run cooler and more efficiently for longer life The built-on vacuum attachment captures concrete dust during drilling and is activated by the tool for operator convenience Vacuum powered by separate motor to maintain tool drilling performance, and provide a 2 second delay to capture remaining concrete dust Sequential Impact Timing provides timed hammering during rotation to minimize overlapping bit impacts resulting in up to 50-Degree faster drilling