The Makita 20 lb. Demolition Hammer (accepts 3/4 in. Hex Shank bits) delivers 2,000 BPM and 10.5 ft. lb. of blow energy on target. The D-shaped handle helps absorb vibration, while the 1-touch latching retainer allows easy bit changes. The HM1211B has a hex-style chuck which accepts 3/4 in. steel bits. This hammer is factory-packed in grease for reduced maintenance.