Use the 300 Series Adapter with the 1/8" (3 mm), 1/4" (6 mm) or 3/8" (10 mm) diamond drums to drill precise holes. Works right on top of larger diamond drums, no need to change or remove before using.

Key Features

• Use the diamond drill drums to make holes in mineral based materials like stone, tile, and glas.
• Drill openings for clock works
• Make holes for hanging
• Create fine details and precise designs.

Fits .312" (7.92 mm) arbor
TIR <.0025" (.0635 mm)