RYOBI ONE+ 18V Brushless 15 in. Cordless Attachment Capable String Trimmer with Edger Attachment, 4.0 Ah Battery, and Charger P20110-EDG - The Home Depot
Amazon.com: RYOBI P20110 ONE+ 18-Volt Lithium-Ion Cordless Attachment Capable Brushless String Trimmer, 4.0 Ah Battery and Charger Included
How To: RYOBI EXPAND-IT Attachments - YouTube
RYOBI P20101BTL ONE+ HP 18V Brushless 15 in. Attachment Capable String Trimmer (Tool Only) | Bigbigmart.com
Ryobi Expand-It 18-Volt Lithium-Ion Cordless String Trimmer Power Head (Attachment Capable, Attachments, Battery and Charger NOT Included) - Walmart.com
RYOBI P20140-AC ONE+ 18V 13 in. Cordless Battery String Trimmer/Edger – My Store