Makita HR4001C 1-9/16-Inch 11 Amp SDS-Max Rotary Hammer Powerful 11.0 AMP motor; 1,350-2,750 BPM to handle the most demanding applications Constant speed control automatically applies additional power to the motor to maintain speed under load to complete the most challenging jobs Soft start suppresses start-up reaction for more control and better accuracy Variable speed control dial enables user to match the speed to the application for greater versatility L.E.D. service light notifies the user approximately 8 hours before the brushes need to be replaced L.E.D. power light indicates switch failure or cord damage Torque limiting clutch engineered to prevent gear damage by automatically disengaging gears if the bit binds Sequential impact timing delivers timed hammering during rotation to minimize overlapping bit impacts, resulting in up to 50% more drilling efficiency Makita Motor Advantage engineered with field core interlocking steel laminations, dual ball bearing armature and more copper commutator bars, increasing energy transfer efficiency for more power and longer tool life Automatic brush cut-off protects commutator from damage for longer tool life 2-mode operation for ""Hammering Only"" or ""Hammering with Rotation"" Lock-on slide switch for continuous operation (""Hammering Only"" mode) Externally accessible carbon brushes for greater serviceability Ergonomic soft grip provides more comfort and control 16.4 ft. jobsite cord for greater versatility and instant power Accepts SDS-MAX bits Side Handle (416299-1) D-Handle (417003-1) Depth Gauge (321248-4) Bit Grease (194683-7) Tool Case (154678-2) HR4013C HR2621 HR2611F HR2811FX HR2475X2 HR2475 HR4510C HR3210C HR2811F HR2470F HR4002 HR5210C HR4041C HR1830F HR4010C HR2432 HR5000 One touch sliding chuck accepts SDS-Max hammer steel 2-mode switch for "hammering only" or "hammering with rotation" Preset variable speed dial with 5 settings to match the bit speed to the application LED power light indicates switch failure or cord breakage;LED service light indicates carbon brushes need to be replaced Externally accessible brushes for easy replacement and longer motor life