The product is 2 sets, 4 high-speed chipper blades designed for wood chippers including models GUO033 and GUO035. These blades are made of steel and feature impact shredder/chipper technology for efficient wood processing. The blades are compatible with the specified model and are easy to install with no assembly required. Made in China by Pandaa007, these blades are a reliable replacement part for maintaining your wood chipping equipment.