The dewalt dw331k heavy duty jigsaw has a rugged motor and full variable speed control delivering fast cutting action of up to 3100min with a tapered saw blade roller that controls the blade deflection at maximum depth of cut with a 4 position pendulum action that controls the aggressiveness or smoothness of cuts fitted with full wave electronic speed control with feedback that ensures the blade speed is maintained under any load for a consistent finish across all materials the patented anti vib