8" x 1.5" CBN Grinding Wheel, 5/8" Bore - Sharpen High Speed Steel & Carbide Tools (80 Grit) With the 8" CBN Grinding Wheels you won't have to worry about dressing or shaping like typical aluminum oxide wheels. These wheels don't wear! The CBN wheels are machined from solid steel and are bonded with Cubic Boron Nitride (CBN). Use the CBN wheels for any sharpening projects, including; turning tools, chisels, plane irons and more. With the 8" CBN Grinding Wheels you will achieve a super fine, sharp edge with polished bevel on either hardened tool steel or carbide. These wheels can make almost any grinder perform at a much higher level. Just think about not having to prepare your grinding stone by dressing and shaping it each time, simply turn on your grinder and get to sharpening without any hassle. Designed for use with Slow Speed Grinders. The CBN Grinding Wheel comes in 80 & 180 Grit 8" x 1-1/2' width & 5/8" side sharpening and the bore opening is 5/8" in diameter. CBN Grinding Wheels are designed to be used to sharpen hardened Steel or Carbide. Sharpening non-heat treated steel, aluminum or other soft metals will damage the CBN Grinding Wheel. CBN wheels last for years in comparison to standard grinding wheels giving you less to worry about and more opportunity to save time and money.