Brush Types Included:One 3.5" (89mm) 360-Degree cone-shaped medium brush (ideal for curved surfaces and tight corners).One 3.5" (89mm) flat round medium bristle brush (designed for flat, medium-sized surfaces).One 2" (50mm) small detail medium bristle brush (for tight spots and precision cleaning).Shank Size: Features a standard 1/4" Hex quick-change shank made from corrosion-resistant zinc/nickel-coated steel, compatible with most cordless drills and impact drivers.Bristle Material: Made from heavy-duty dark green nylon bristles that provide excellent resilience and high abrasion resistance.