Grass Gator - Extra Heavy Duty - Cuts Weeds and BrushFits 99 of all straight shaft gas trimmers Echo, Shindaiwa, Stihl, Husqvarna, Honda, Marita Curved Shaft Trimmers - There is an online chart available to see if your Weed Eater will work with this. Stainless Steel Blades - Instructions on on back of package. Model 4650