Feature●NCLUDED: 10 Piece Tungsten Carbide Burr Bit Set INCLUDED: 10 Diamond Cutting Wheels (With 2 Mandrels) Diamond Cutting Wheel Diameter: 1" Shank Diameter (Both Sets): 1/8" (3mm)Description Diamond Cutting Wheels Produce Super Smooth, Super Fine Cuts. They Work Great On ALL Types of Metal, Stone, Glass, Concrete, Tile, And Much More!