Double reciprocating blades for reduced vibration and heavier cuts. Cuts up to 1/2" Diameter Growth, our hand sharpened blades let you shear new growth, as well as established heavy growth. Motor stops in less then 1/2 second if either switch is released. Reduces the chance of coming into contact with moving blades. Meets or exceeds International Safety Standards. Blades will only engage if both switches are simultaneously depressed. Increases user safety.