11.5A, 1-3/4" 45MM, Heavy Duty Spline Rotary Hammer With Kit Box, Motor Provides High Performance & Overload Protection, Built For Continuous, Large, Deep Hole Drilling & Performs Well In Moderate Chipping Jobs, Adjustable Speed/Impact Control Allows User To Limit Speed & Impact Force, Electronics Enable Hammer To Maintain Specified Drilling Speeds Under Load, Red/Green LED Service Lights Indicate When Service Is Necessary, Soft Start Feature Allows For Precise Bit/Chisel Start Up, Hard Hitting Hammer Mechanism For Fast & Efficient Penetration, Dual Wall Housing Construction With Rubber Mounts Isolates Vibration To Inner Housing, Multiple Seals Prevent Dust From Entering Tool, Switch & Brushes Designed For Long Life, Highly Efficient Cooling System Protects Tool, 360 Degree Side Handle Is Easily Adjustable, Clutch Reduces Sudden, High Torque Reactions, Modular Design Provides Easy Serviceability.