Package includes - 1 x head protection cover + 1 x upper fixing part + 1 x lower fixing part + 1 x lock nut. material: metal Easy installation: stable characteristics and high reliability. Application: A good replacement kit for finer trimmers. The clipper attaches to the swivel with this attachment kit. Good compatibility: universal and practical replacement accessories. Please let us know if our replacement parts do not match your mower model. We are more than willing to help you. Thank you for your support to our store.