5 Pack, 4.5" x 0.045", Metal & Stainless Cutting Wheel, 7/8" Arbor, Thin .045" Wheel Design For Fast Burr Free Cutting, Proprietary Aluminum Oxide Grain Combination For Aggressive Cutting Action, Proprietary Material Mix Ensures Durable Long Life Wheels, 2 Full Sheets Of Fiberglass For Durability & Safety, Fast Burr Free Cutting.