4-1/2" x 1/8" x 7/8" A24r 12 000RPM General Pur. Box of 25 The DeWalt DW4518 is a 4-1/2 X 1/8 X 7/8 General Purpose Metal Cutting Wheel. It has 3 full sheets of fiberglass for durability and safety. It uses 100% virgin grain for enhanced removal and long life. The proprietary material mix ensures premium performance.