Coffee Grinder -Glass Grinding Wheel Diamond Segment Grinder Highlights Generic Brand Glass Grinding Wheel Diamond Segment Grinding Wheel Description: 0.31 inch small hole diamond grinder head on a hardened base. Guaranteed not to peel, reduces tree binding. Universal bit for all suah grinders like glass grinders. The stained glass grinder head bit is made of metal for superior strength and long life. A large grinding surface: the abrasive height is 3 cm. Specification: Material: Metal Big Hole: Approx. 1.8 cm / 0.71 inch Small hole: approx. 0.8cm / 0.31inch Waist Size: 3cm / 1.18inch Waist (L): 3.5cm / 1.38inch Package Include: 2pcs Stained Glass Grinder Head Wick Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Due to manual measurement, there may be 1-2mm error in size.