CBN Grinding Wheel, Dia 6" x 1" Wide with 1/2" Arbor, Diamond Grinding Wheel for Sharpening High Speed Steel, Grit 80. FUNCTION: CBN grinding wheel is used for sharpening high-speed steel woodworking tools The high-quality diamond and durable steel base provide a long service life. No worry about deformed PREMIUM MATERIAL: Our diamond grinding wheels are coated with high density diamond. Sharpening High Speed Steel Woodriver 180-Grit Cbn Grinding Wheel, 6"X 3/4" For Grinders With A 1/2 Sharpening Wheel Grit 240 Cubic Boron Nitride (CBN) is a man-made crystalline material which is one of the hardest materials in the world. It is just slightly below Diamond on the hardness scale. CBN grinding wheels have been used in manufacturing processes for many years and are now available for common bench grinders EFFICIENT TOOLS: Premium and durable diamond makes our grinding work easier more efficient. APPLICATION: This grinding wheel is suitable for most bench grinders. Diamond Grinding Wheel Grinding Wheel, 6Inch Dia X 1Inch Wide, With 1/2Inch Arbor, For Sharpening HSS, 240 Grit Cbn Grinding Wheel SIZE: Diameter : 6, Arbor Hole: 1/2, Thickness: 1, Grit: 240