Check the listing for details. 10 Pack 4.5” 5/8"-11 Nut Jumbo 40 Grit Ceramic Flap Disc Grinding Wheels. Condition: New. Listed at 40.00 USD. Description: 4-1/2" x 5/8" Built in nut High Density ceramic flap disc grinding wheels. Ceramic material will outlast any Zirconium grinding disc. These disc pack on an additional 40% more material than regular density flap disc these flap discs and include a trimmable plastic back that will not distort under pressure like fiberglass backed disc. These discs will outperform and Save You Money. Made in the same factory as many other flap wheels disc. Specifications: Quantity: 10Backing: Trimmable Plastic Grit: 40Arbor Size: 5/8" Built in NutDensity: High Density JumboMaterial: Top Quality European Ceramic FabricApplication: All metals Machine Used On: 4.5" Angle GrindersMax Speed: 13,000 rpmSafety: Safety glasses, gloves, ear protection Features: Trimmable back so no wasted material. Built in 5/8" nut for fast and easy wheel replacement. Built in nut removed grinder bolt so the disc can lay flat on material.