Manufactured from sintered carbon boron carbide, one of the worlds hardest materials, being exceeded only by diamond.
It is an extremely hard & wear resistant superabrasive.Genuine Norton superabrasive.Excellent product life for hand dressing radii and angles on grinding wheels.Sintered Boron Carbide Dressing Sticks - 6 x 12.7 x 76.2 (1/4" x 1/2" x 3")Part No. 61463610148