2/3.5/4/5 inch attachments provides different sizes to accomodate your cleaning needsEasy to operate and is perfectly compatible attaches to any power drill or impact driver via the built-in 1/4 inch stainless steel quick-change shaft, which can fit most drillsMade of high-quality Nylon, which is dense and regular, has high hardness and is not easy to be deformedPerfect for scrubbing bathroom, kitchen surfaces, tubs, showers, sinks, etc.Drill NOT includedPackage Contents4 x Brush Attachment""Material: Nylon, Plastic, MetalBrush Diameter: 2/3.5/4/5 inches