DEWALT XTREME 12-volt Max 5-3/8-in Brushless Cordless Circular Saw in the Circular Saws department at Lowes.com
DEWALT ATOMIC 20V MAX Cordless Brushless 4-1/2 in. Circular Saw (Tool Only) with 4-1/2 in. 4-Tooth Fiber Cement Saw Blade DCS571BW412PCD - The Home Depot
DEWALT 20-volt Max 6-1/2-in Cordless Circular Saw at Lowes.com