amazon.com is selling the DEWALT Cutting Wheel, General Purpose Metal Cutting, 4-1/2-Inch, 5-Pack (DW8062B5) for $2.99

• Highly durable. Max rpm : 13300
• Thin .045-Inch 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 and safety
• Fast burr free cutting