The BAUER™ 11 Amp, 1-9/16 in. SDS-MAX Type Variable-Speed Rotary Hammer powers through concrete and masonry. BAUER™ anti-vibration technology delivers power to the bit and less vibration to the handle for fast, precise drilling with less user fatigue. A built-in safety clutch protects you in case the bit binds when drilling in concrete or masonry. The quick change SDS-MAX type bit system on this rotary hammer holds bit securely.