1st Upgrade for Wood/Marble Floors: Equipped with soft bristles made of horsehair, this brush is exceptionally gentle on surfaces. It's safe to use on wood, marble, and other delicate floors without the risk of scratches. 2nd Upgrade for Improving Pet Hair Pickup: The front of the brush mouth features a unique design that enhances its ability to pick up pet hair on hard floors. This makes it superior to other products in effectively removing fur from your floors. 3rd Upgrade for Flexible Brush Head: The clever design of the brush head allows it to swivel 90 degrees to the left and right. This flexibility enables the brush to reach narrow spaces as tight as 2-3/4 inches. Additionally, the swivel is spring-loaded, ensuring the brush head always returns to its original position. Versatility: Suitable for use on low carpets and all hard floor types, including wood, marble, tile, and bare floors. Wide Compatibility: This tool kit includes a 2-1/2 inch to 1-1/4 inch adapter, making it compatible with Shop-Vacs that use 1.25-inch or 2-1/2 inch accessories. Please note that it does not fit Shop-Vacs with a 1-7/8 inch or 2-1/4 inch outer diameter hose. -Gentle on Wood/Marble Floors: Soft horsehair bristles ensure safe cleaning without scratches. -Enhanced Pet Hair Pickup: Unique front design improves fur removal on hard floors. -Flexible Brush Head: Swivels 90 degrees for reaching narrow spaces, with spring-loaded return. -Versatile Use: Effective on low carpets and all hard floors, including wood, marble, and tile. -Wide Compatibility: Includes a 2-1/2'' to 1-1/4'' adapter, fitting most Shop-Vacs (excluding 1-7/8'' or 2-1/4'' hoses).