Features: - 100% brand new and high quality - Made from high-quality brown corundum material, which is not only durable but also stable - Efficient and hard-wearing, with low grinding noise.long service life - Applicable to general metal, carbon steel, alloy steel, stainless steel, cast iron, nonferrous metals and other weld grinding - Can increase the strength and absorb vibration, will not get dirty or dirty during use; semi-open grinding disc to reduce the load on aluminum surfaces - Used for dedusting, deburring, getting stuck, flash removal, and easy to polish and dust - Ideal for The Home, Workshop, Hobbyists, Tradesmen, Builders and DIY Enthusiasts, etc Specifications: Color: Dark Blue (As Pictures Show) Material: a mixture of zirconia and alumina particles Total diameter (Approx.): 2 inches (51 mm) 1/4" (6mm) shoulder shaft Grit: 40# ,60#,80#(each 5pcs) Maximum speed 12000 to 14000 rpm Package Includes: 15 x Sanding Wheels(Each 5Pcs of 40# 60# 80#) 1 x Holder Note: 1. Due to computers display colors differently,the color may vary slightly from the above images,Thanks for your understanding! 2. Manual measured, please allow 2-4mm error 3. If You have any questions, please feel free to contact us, we will reply as soon as possible and help you solve!