✅[Advantage] Stained Glass Grinder Head Bit is metal for strength and long life.
✅[Usage] 0.31 inch small hole diamond grinder head on hardened base.
✅[A big grinding surface]: abrasive height is 3cm.
✅[Feature] Guaranteed not to peel,reduces shaft binding.
✅[Occasion] Bit universal for all grinders suah as Glass grinders.