The Bosch 11240 1-9/16-inch SDS-Max combination hammer features a 10 amp motor, dual-mode selector lever for hammering with or without rotation, and Vario-Lock positioning that rotates and locks the chisel into 12 different positions. The SDS-Max system facilitates tool-free bit changes with automatic bit locking, dust protection, and a maximum-impact energy transfer rate. The tool includes such extras as innovative service modules designed so a qualified service technician can quickly replace the brushes and cord, a 360-degree auxiliary handle, and an integral clutch (to minimize torque reaction). Features SDS-Max bit system offers tool-free bit changes, with automatic bit locking, dust protection, and efficient impact-energy transfer rate Combination dual mode selector delivers 2 modes of operation: rotary hammer and hammer-only mode Vario-Lock positioning rotates and locks chisel in 12 different positions to optimize working angle Innovative service modules are designed so a qualified service technician can quickly replace the brushes and cord 360-degree auxiliary handle provides a wide range of movement along with operator comfort Integral clutch helps minimize torque reaction Grounded design, UL-listed, complies to OSHA Specifications Rating: 120 volts Amps: 10 amps No-load speed: 400 rpm No-load beats per minute: 3,000 bpm Impact energy: 5.2 ft./lbs. Max hole diameter in concrete: 1-9/16 inches Max hole diameter in concrete (core bit): 4 inches Max hole diameter in concrete (thru hole bit): 2-1/2 inches Optimal concrete capacity range: 1/2 to 1-3/8 inches Length: 17-1/4 inches Weight: 13.2 lbs.