Makita® Corded Rotary Hammer Drill, 1-9/16 in Chuck, Spline Chuck, 1300 to 2600 BPM, 6.8 ft-lb Impact, 230 to 460 RPM No-Load Speed, 4-5/8 in Max Core Bit Compatibility, 1-9/16 in Maximum Solid Bit Capacity, 120 VAC, 12 A, Forward Switch Control, 16-7/8 in OAL. The Makita® HR40410C Toothed Shaft 1-9 / 16 in Rotary Hammer Features a Powerful 12 A Engine Designed with a Central Field of Interlocking Steel Blades, Dual-Bearing Rotor and Large Switch Surface Area For Energy Efficient Transfer Produces up to 230 to 460 RPM and 1300 to 2600 BPM and Has 2 Modes of Operation For Just Hammering and Hammering with Rotation Soft Start Functionality Facilitates Control and Improves Accuracy While The Sequential Impact Counter Promotes Faster Work. Makita® HR4041C Corded Rotary Hammer Drill, 1-9/16 in Spline Chuck, 1300 to 2600 BPM, 230 to 460 RPM No-Load