1/8" Shank Steel Polishing End Brush Fit Dremel ,Set of 10 It is applicable for metal derusting, wood carving, jade polishing, etc. Good toughness, not easy to be broken, wearable, long life. material: steel Total length: 50mm.Brush length: 9mm. Brush diameter: 5mm.Handle diameter: 3mm/ 1/8"