Pack of Five (5) Brand New Aftermarket Replacement 4" x 1/4" x 5/8" T27 Metal Grinding Wheels - Used for Steel, Stainless Steel, Iron, and All Ferrous Metals- Moderate to Heavy Grinding applications in Compact Areas for Fast Stock Removal- Great for All-Purpose Grinding, Rust Removal, Deburring, and Removing Weld Splatter- Designed for Fast Cutting Action and Long LifeTech Info:4" Diameter1/4" Thick5/8" Center Arbor Hole24 Grit (Coarse)15,300 Max RPMType 27 - Depressed CenterFiberglass Reinforced