Makita HR4002 1-9/16-Inch SDS-MAX Rotary Hammer Powerful 10.0 AMP motor delivers 2,500 BPM for the most demanding applications 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% faster drilling 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 12 bit angle settings allow the bit to be set at different positions for operating convenience Automatic brush cut-off protects commutator from damage for longer tool life 2-mode operation for ""Hammering Only"" or ""Hammering with Rotation"" ""No hammering when idling"" functions helps increase tool life One-touch sliding chuck for quick bit changes Soft grip handle provides increased comfort on the job Accepts SDS-MAX bits Side Handle (158131-0) Depth Gauge (321248-4) Bit Grease (194683-7) Tool Case HR4013C HR2621 HR2611F HR2811FX HR2475X2 HR2475 HR4510C HR3210C HR2811F HR2470F HR5210C HR4041C HR1830F HR4001C HR4010C HR2432 HR5000 Built-in torque limiting clutch disengages if bit jams Powerful 10 AMP motor delivers for the most demanding applications One-touch sliding chuck for quick & easy bit changes Dual mode operation Rotation with hammering and Hammering only make this tool Soft grip helps reduce the level of vibration felt by the end-user