This is a genuine manufacturer-sourced replacement part designed for use with string trimmers. This extension boom assembly includes a push button quick connect end for installation on your string trimmer head. The other end includes a recepticle to accept a variety of universal attachments. Please refer to the owners manual or contact our customer service department for specific instructions on installation and compatibility. Should fit any 1" round universal trimmer heads and accessories with square drive shafts. This high-quality aftermarket replacement part is designed and manufactured to meet or exceed the original manufacturers specifications. Perfect for fall pruning and adding length to your existing trimmer system.