DescriptionGood 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.Feature-Color: As Shown. - Material: Alumina. - Size: 15 x 2.5 x 2.5cm. - Enhanced surface and control: resulting from the angled flaps maximizes the optimal application of pressure to the cutting surface while ensuring ease of use, comfort, and grinder controlthe angled flaps enable the user to hold the angle grinder at a natural, angled positioning while still enabling the disc to maintain with the grinding surface. - Superior durability and value: stems from the alumina material which lasts longer than traditional materialmaking 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. - 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 noiseand ultimately, their superior value.