Feature: Common Use 1/8'' shank is suitable for most electric drill, electric flex shaft grinder, flex shaft hanging grinder, etc. Wide Compatibility It can easily remove rust, paint, dust and burrs on metal and wood surfaces and can also use to grind any kind of rough surface. Combo Set of 45 PCS This set includes 3 different sizes of wire brush wheels --- 5mm, 15mm and 25mm, fulfilling your different using needs. Small & Flexible Their small sizes make them easy to perform delicate work on details which are difficult to reach with big tools. Applicable Material You can use them on jade, ceramics, , wood, iron, stainless steel, etc. Specification: Material: Stainless Steel Shank diameter: 3.175mm/ 1/8in Brush wheel diameter: 5mm/ 15mm/ 25mm Total length: 27mm/ 35mm/ 36mm Quantity & Size: 15* 5mm, 15* 15mm, 15* 25mm Packing list: 45 * Wire Brush Wheels