I have a 40v max weed eater and egder will this work with one of those two?

Hello, This will work with the multi-head system pending your model. To better answer your question, please contact our Lowe’s Customer Care team at 800-445-6937. Hours are 8:30 a.m. to 7 p.m. EST 7 days a week, or you may call your local store. Agents can either answer your question or transfer you to your local store to answer your specific question. Thank you for your inquiry!