This is a genuine manufacturer sourced replacement part. It is made to work on gas powered trimmers. It supplies mixture of air and fuel to the engine. This kit includes a metal body carburetor, carburetor gasket and two (2) lock nuts used to secure the carburetor. To complete this repair you would need a wrench and a torx screwdriver. ...Read more • Remove air box cover, filter and the base • Disconnect fuel lines and remove old carburetor • Install new carburetor and re-connect fuel lines • Re-assemble and test the unit