4-1/2" x 1/8" x 7/8" arbor, fast cut metal Depressed center wheel, double reinforced with industrial Grit & glue for increased life & durability, superior friability allows wheel to break down quickly consistently Exposing new grain for increased sharpness & longer life, for low angle & vertical grinding, Bulk. 

FEATURES

• High performance aluminum oxide grain for long life and high material removal
• High grain concentration for Agressive grinding action and smoother running wheels
• Proprietary material mix ensures durable long life wheels
• 3 full sheets of fiberglass for durability and safety