A powerful 1100W motor produces 7.8J of impact energy. High impact energy combined with a high impact rate results in a high chipping output. Ergonomic design: One-hand vario-lock design for changing chisel bits in 12 positions, lock-on button for continuous work. Longer life: Patented grease sealing ring to prevent leakage in conjunction with dust cap solution for better dust proofing results in a longer life time. Ergonomic design: One-hand vario-lock design for changing chisel bits in 12 positions, lock-on button for continuous work.