Amazon.com : EGO Power+ STA1500 15-Inch String Trimmer Attachment for EGO 56-Volt Lithium-ion Multi Head System : Patio, Lawn & Garden
CRAFTSMAN WS2400 27-cc 2-cycle 18-in Straight Gas String Trimmer with Edger Conversion Capable (Battery and Charger Not Included) in the String Trimmers department at Lowes.com
TrimmerPlus Universal 9 in. Garden Cultivator String Trimmer Attachment TPG720 - The Home Depot