Good for use on mild steel for finishing, cleaning up imperfections. A great deal compared to your local store. Buying these in bulk saves you a ton of money. and having a few spares is handy. Use these on aluminum, wood, and rusty metal. It can be installed on electric drill conveniently. Feature - Color: White + Yellow. - Material: Cloth. - Size: 14.5 x 14.5 x 1.5cm. - Made of material, durable and convenient. - Superior durability and value: stems from the alumina material which lasts longer than traditional material ndash making for a more durable and cost-effective grinding wheel: they simply provide more for less. - Extensive application: Stock removal, grinding, blending, beveling, deburring, removal of rust and paint, finishing, and other similar applications on metals, non-ferrous materials, fiberglass, plastics, woods, and many other surfaces. - Suitable for metal, jewelry, hardware, stainless steel, aluminum products, wood, plastic, ceramic, glass and clock processing surface grinding and polishing processing. - choice abrasive: flap discs have quickly become the go-to abrasive disc and are continuing to grow in popularity due to their cooler cutting, less frequent burning and gouging, lower vibration and noise ndash and ultimately, their superior value.