Glastar has gone out of business. What we have here is all that is left.
GLASTAR GRINDING HEADS
Glastar's grinding heads outperform and outlast all
other heads three to one! The secret is the unique
diamond bonding that eliminates peeling, creating a uniform surface that lasts.
4733
Drill bit
Radius Edger - combines a flat and radius (rounded) edger. Select this
for mosaics or when working with exposed glass edges. Use the fine
grit radius head to virtually eliminate chipping on decorative mirror edging.
4771
Glastar is no longer in business.
If you are looking for high quality bit like Glastar's, please try
Techniglass' Brilliant Bits