Composite 1 HP 4 in. Cut-Off ToolAIRCAT 4 Cut Off Tool features precision bearings that reduce vibration and spindle run out. Patented tuned exhaust muffler technology that allows discharged air to pass without developing back pressure, thus retaining more power, while significantly reducing noise. More Power Half the Noise. The ergonomically engineered handle design relieves stress and fatigue on the operator hands, wrists and arms and the compact design is ideal for deburring,