Weiler Trimmable Flap Disc - Compatible with motors of 13000 rpm speed and is ideal for cutting grinding metals and steels. Weiler Trimmable Flap Disc features 40 grit for greater finish and measures 4.5 in diameter for greater coverage. It is compatible with motors of 13000 rpm speed and is ideal for cutting grinding metals and steels. • Applicable Materials: Cast Iron Most Metals Non-Ferrous Soft Metal Steel. • Type: Grinding Wheel. • Weight: 1 lbs. • Application/Usage: Deburring Finishing Grinding Weld blending. • Diameter: 4.5 . • Arbor Diameter: 0.87 . • Speed: 13000 rpm. • Tool Shape: Type 29. • Grit: 40. • Features: The Backing can be Trimmed up to 3/8 from the Original Diameter Dramatically Extending the Life of the Disc. • Sold as 1 Each.