DEWALT DW8424B5 4-1/2-Inch by 0.045-Inch Metal Cutting Wheel, 7/8-Inch Arbor, 5-Pack This are easy to use This are highly durable This is manufactured in China 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