Powerful 12 amp motor; 230-460 RPM for the most demanding jobs * Dual-purpose "hammering only" or "rotation with hammering" modes for multiple applications * No hammering while idling helps increase tool life. * Torque-limiting clutch * Electronic variable-speed control dial enables user to set speed per application * "No hammering when idling" function helps increase tool life * 2-mode operation for "Hammering Only" or "Hammering with Rotation" for multiple applications * Accepts Spline bits * Automatic brush cut-off protects commutator from damage for longer tool life * Constant speed control automatically applies additional power to the motor to maintain speed under load to complete the most challenging jobs * Depth Gauge (321248-4) * HR1830F * HR2432 * HR2470F * HR2475 * HR2475X2 * HR2811F * HR2811FX * HR3210C * HR4001C * HR4002 * HR4010C * HR4510C * HR5000 * HR5210C * High quality aluminum housing allows for greater durability and longer tool life * 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 * Powerful 12.0 AMP Motor delivers 230-460 RPM and 1,300-2,600 BPM for the most demanding applications * Sequential impact timing delivers timed hammering during rotation to minimize overlapping bit impacts resulting in up to 50% faster drilling * Side Handle (416549-4) * Soft start suppresses start-up reaction for more control and better accuracy * Tool Case * Torque limiting clutch engineered to prevent gear damage by automatically disengaging gears if the bit binds * Variable speed control dial enables user to match the speed to the application for greater versatility