DEWALT DC415KL 36-Volt Lithium Ion Cordless 4-1/2-Inch Cut-Off Tool, with NANO Technology 6,500 rpm for fast cutting speed Convenient trigger switch with lock-off button for easier gripping 2-position side handle offers greater comfort and control Quick-change wheel release allows tool free wheel removal without need for a wrench Low profile, jam-pot gear case provides precise gear alignment for a smoother, quieter transmission