Package:9 pack nylon filament abrasive wire brush set including three pack pen brush,three pack flat brush,three pack bowl brush. Size:pen brush-6x25mm, flat brush-6x25mm;bowl brush-6x25mm1/4-inch round , Max RPM: 4,500,bowl brush and flat brush is 3 inch, pen brush is 1 inch Durable: Abrading wheels and brushes with coarse abrasive grit embedded into the nylon brush strands, so they quickly and easily rust, corrosion, and they also sand, scuff, and deburr metal, wood, plastic, and ceramic surfaces. Wide applications:Nylon Brush kit is an All-Material-In-1.Safe and rust and paint remover and cleaner on most wet or dry applications like Metal, Steel, Stainless Steel, Wood, Aluminum, Plastic, PVC, Tiles, and more More : to use than wire brushes, synthetic, resistant Nylon Bristles are extremely safe and will not spark, corrode, puncture skin, Maintains shape & will not rust,Will not shed bristles under normal conditions. Colour:gray+blue+red Material:nylon Package Contents: 3 x Red Brush 3 x Blue Brush 3 x Grey Brush Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.