RYOBI 40V HP Brushless 15 in. Cordless Carbon Fiber Shaft Attachment Capable String Trimmer with 4.0 Ah Battery and Charger RY40290 - The Home Depot
Kobalt 40-volt Max 16-in Straight Attachment Capable Cordless String Trimmer (Tool Only) in the Cordless Electric String Trimmers department at Lowes.com