Features: -Designed to attach different types of blades to your mower, it fits most straight-shaft trimmer models. -You can replace the trimmer head you want at any time and it can be reused. -Suitable for Husqvarna or Stihl weed trimmers: Stihl FS55R, FS56R, FS36, Sarlo SS-18, FS81, FS80, FS81, FS85, FS90, FS100, FS110, FS120, FS200, FS250 and more. Specification: Material: iron Color: silver, copper Diameter: 4.33in, 2.56in, 1.77in, 0.87in Package Included: 2x Press plate protective washers 2x Press plates 2x Flange nuts 2x Hexagon wrenches .