Please allow 1-5mm errors due to manual measurement.Electric drill is not included.3 PCS Drill Brush KitDesigned for clean bathtub, grout, bathroom surface, floor, tile, shower, toilet and carpet etc.This drill brush attachment kit includes 3 brushes with different sizesConvenient to use.Nylon bristles will not scratch your bathtub and shower tile surfaces.Color: as the picture shownBrush have a quarter inch quick change shaft. you time.100% Brand new and high qualityItem color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same.Durable in use.Size: as shown in picture