RYOBI ONE+ 18V Cordless 5-1/2 in. Circular Saw Kit with 4.0 Ah Battery and Charger - Walmart.com
RYOBI ONE+ 18V Cordless 6-1/2 in. Circular Saw (Tool Only) P507 - The Home Depot
Ryobi P504G One+ 18 V Lithium Ion Cordless 5 1/2 Inch Circular Saw w/ Carbide Tip Blade (Battery Not Included, Power Tool Only) - Power Circular Saws - Amazon.com