A high-quality diamond grit available in 1” and ¾’ diameters with a variety of grits to choose from. Engineered with industrial elastomer, the Quick-Fit Bit Holder absorbs grinding vibration and protects glass from fracturing or chipping. Layers of high-quality diamond particles give the Quick-Fit Bit a long-lasting, ever-sharp grind. May be adjusted vertically on the grinder shaft and may be reversed to utilize full glass grinding surface. High-impact polymers extend the life of the Quick-Fit Bit Holder and eliminates the possibility of corrosion, making bit changing less time consuming.Fits all Glastar (except All Star), Inland and Gryphon grinders.Note: This item only includes the replacement bit, not the entire Quick-Fit Bit system.