Dewalt, Dw4514b5-4, Grinding Wheels, Material Removal Accessories, 4-1/2 Inch, Yellow 4-1/2" X 1/4" X 7/8" General Purpose Metal Grinding Wheel (Package Of 4) The Dewalt 4-1/2" X 1/4" X 7/8" General Purpose Metal Grinding Wheel Is An Extremely Durable And Useful Attachment. Use This To Increase Your Efficiency And Decrease Your Work Time. Superior Build Quality Means You Will Be Using This Bit For Years With Minimal Wear And Tear. A Must Have For Any Professional Or Do-It-Yourselfer. Features: High Performance Aluminum Oxide Grain For Long Life And High Material Removal - High Grain Concentration For Aggressive Grinding Action And Smoother Running Wheels - Proprietary Material Mix Ensures Durable Long Life Wheels - 3 Full Sheets Of Fiberglass For Durability And Safety - Specifications: Diameter: 4-1/2" - Edge Thickness: 1/4" - Arbor Size: 7/8" - Grit: A24r - Application: Metal Grinding - Max Rpm: 13300 - Pack Quantity: 4 - Dewalt Is Firmly Committed To Being The Best In The Business, And This Commitment To Being Number One Extends To Everything They Do, From Product Design And Engineering To Manufacturing And Service.