1-1/2 in SDS-max Rotary Hammer These new 1-1/2 in rotary hammers deliver outstanding drilling performance in a lightweight package Milwaukee s patented vibration isolation system greatly reduces operator fatigue by absorbing the hammering action with floating handles A soft-shift stop rotation knob permits the operator to smoothly change from hammer-with-rotation mode to the hammer-only mode An 11 0 amp motor combined with an electronic feedback control circuit allows a full 6 inch thin wall Core Bit to be driven through 5000 PSI concrete without bogging down The on-off switch is coupled with a speed dial so that the speed and blow energy can be correctly matched to the application or accessory The bit locking system features one-handed/531521/5315 21/-Tools/Power Tools/Hammer Drills/Hammer Drills