Carbide blades made of high carbon steel with brazed carbide tips. They probably fit any garden trimmer, brush cutter, weed eater that comes with 1" (25.4mm) arbor hole. Please refer to the owner's manual of your trimmer / brush cutter / week eater and our product description to determine whether these blades will fit your tools. Working with these blades could be dangerous, please always be sure that the blades are installed securely and used safely.