Material: The polishing brushes are made of high quality cotton wool with good polishing ability, high efficiency, durable for long service life. 2.35mm Shank: With 3/32" (2.35mm) shank, these buffing wheels, an efficient polishing tool, fit for most rotary tool and drills. Fine Grinding: These abrasive buffing wheel brushes is prefect for jewelry, jade and watch surface polishing, cleaning, rust removing, grinding, deburring and wood working. Note: Recommended to use the lowest gear because excessive speed will cause the brush apart. Wear dust control and protective eyewear equipment are required. Service Guarantee: LDEXIN guarantees high quality and good service. If you are not satisfied, we offer a return service. No questions asked. Because we want you to be happy! LDEXIN 20Pcs Little Buff Wheels Polishing Buffer Wheels for Rotary Drill Tools, Cloth Buffing Wheels for Watch Jewelry, 3mm Mandrel, White Specification: Product Name: Wool polishing wheels Material: Metal, cloth Brush Wheel Dia.: 25mm/ 1" Shank Dia.: 2.35mm/ 3/32" Total Length: 42mm/ 1.65" Color: Beige Package Including: 20Pcs x Wool wheels Warm Tips: 1. Due to manual measurement, please allow 1-2mm difference, thanks! 2. Our digital images are as accurate as possible. Because of the difference between the display and the light, the color is slightly different.