Makita HR2455X2 1-Inch D-Handle SDS Rotary Hammer with 4-1/2-Inch Angle Grinder Combo Kit Features 3-Mode operation; "Rotation Only", "Hammer Only" or "Hammering with Rotation" Powerful 7.0 AMP motor yet weighs only 6.0lbs Impact Energy (2.0ft. Lbs.); Power-to-Weight Ratio (.32) Positive Lock ensures that the bit is securely fastened 0-1,100 RPM and 0-4,500 BPM (2.7 joules of impact energy) for demanding applications