This Is Dremel's Diamond Wheel Accessory Bit.
FEATURES: A metal wheel completely coated with fine diamond particles for
working with hard materials.
Designed to last and not lose its shape or break.
Provides smooth fine cuts.
Great for cutting, sawing, carving, sharpening, and filing of hard
Use on wood, concrete, brick, porcelain, ceramics, tile, epoxy,
INCLUDES: One Diamond Wheel Bit
REQUIRES: Rotary Tool
SPECS: Shank Diameter: 1/8" (3.2mm)
COMMENTS: Do not use on floor tile!
Recommended speed is 15,000 - 20,000 RPM.